diff --git a/src/main/java/li/cil/oc/Settings.scala b/src/main/java/li/cil/oc/Settings.scala
index 91e49dcd7..65f946d73 100644
--- a/src/main/java/li/cil/oc/Settings.scala
+++ b/src/main/java/li/cil/oc/Settings.scala
@@ -176,7 +176,7 @@ class Settings(config: Config) {
       Array(2, 4, 8)
   }
   val updateCheck = config.getBoolean("misc.updateCheck")
-
+  val alwaysTryNative = config.getBoolean("misc.alwaysTryNative")
 }
 
 object Settings {
diff --git a/src/main/java/li/cil/oc/common/asm/ClassTransformer.scala b/src/main/java/li/cil/oc/common/asm/ClassTransformer.scala
index 1bc68d095..81384c9ca 100644
--- a/src/main/java/li/cil/oc/common/asm/ClassTransformer.scala
+++ b/src/main/java/li/cil/oc/common/asm/ClassTransformer.scala
@@ -6,10 +6,10 @@ import cpw.mods.fml.relauncher.IFMLLoadingPlugin.TransformerExclusions
 import java.util.logging.{Level, Logger}
 import li.cil.oc.util.mods.StargateTech2
 import net.minecraft.launchwrapper.{LaunchClassLoader, IClassTransformer}
+import net.minecraft.tileentity.TileEntity
 import org.objectweb.asm.tree._
 import org.objectweb.asm.{ClassWriter, ClassReader}
 import scala.collection.convert.WrapAsScala._
-import net.minecraft.tileentity.TileEntity
 
 @TransformerExclusions(Array("li.cil.oc.common.asm"))
 class ClassTransformer extends IClassTransformer {
@@ -17,15 +17,15 @@ class ClassTransformer extends IClassTransformer {
 
   val log = Logger.getLogger("OpenComputers")
 
-  override def transform(name: String, transformedName: String, basicClass: Array[Byte]): Array[Byte] = {
+  override def transform(name: String, transformedName: String, basicClass: Array[Byte]): Array[Byte] = try {
     if (name == "li.cil.oc.common.tileentity.Computer" || name == "li.cil.oc.common.tileentity.Rack") {
       return ensureStargateTechCompatibility(basicClass)
     }
     else if (basicClass != null
-      && !name.startsWith( """net.minecraft.""")
-      && !name.startsWith( """net.minecraftforge.""")
-      && !name.startsWith( """li.cil.oc.common.asm.""")
-      && !name.startsWith( """li.cil.oc.api.""")) {
+      && !name.startsWith("""net.minecraft.""")
+      && !name.startsWith("""net.minecraftforge.""")
+      && !name.startsWith("""li.cil.oc.common.asm.""")
+      && !name.startsWith("""li.cil.oc.api.""")) {
       val classNode = newClassNode(basicClass)
       if (classNode.interfaces.contains("li/cil/oc/api/network/SimpleComponent")) {
         try {
@@ -40,6 +40,11 @@ class ClassTransformer extends IClassTransformer {
     }
     basicClass
   }
+  catch {
+    case t: Throwable =>
+      log.log(Level.WARNING, "Something went wrong!", t)
+      basicClass
+  }
 
   def ensureStargateTechCompatibility(basicClass: Array[Byte]): Array[Byte] = {
     if (!Loader.isModLoaded("StargateTech2")) {
@@ -104,9 +109,9 @@ class ClassTransformer extends IClassTransformer {
         case _ =>
           log.fine(s"No original implementation of $methodName, will inject override.")
           template.methods.find(_.name == methodName + "0") match {
-          case Some(method) => classNode.methods.add(method)
-          case _ => throw new AssertionError(s"Couldn't find ${methodName}0 in template implementation.")
-        }
+            case Some(method) => classNode.methods.add(method)
+            case _ => throw new AssertionError(s"Couldn't find ${methodName}0 in template implementation.")
+          }
       }
       template.methods.find(filter) match {
         case Some(method) => classNode.methods.add(method)
@@ -125,7 +130,11 @@ class ClassTransformer extends IClassTransformer {
     writeClass(classNode, ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES)
   }
 
-  val tileEntityName = classOf[TileEntity].getName.replace('.', '/')
+  val tileEntityName = {
+    (try classOf[TileEntity] catch {
+      case _: Throwable => loader.findClass("net.minecraft.tileentity.TileEntity") // Dev env?
+    }).getName.replace('.', '/')
+  }
 
   def isTileEntity(classNode: ClassNode): Boolean = {
     classNode.name != "java/lang/Object" && (classNode.name == tileEntityName || isTileEntity(classNodeFor(classNode.superName)))
diff --git a/src/main/java/li/cil/oc/common/block/Delegate.scala b/src/main/java/li/cil/oc/common/block/Delegate.scala
index 626dc008f..d1eb0969d 100644
--- a/src/main/java/li/cil/oc/common/block/Delegate.scala
+++ b/src/main/java/li/cil/oc/common/block/Delegate.scala
@@ -35,6 +35,8 @@ trait Delegate {
 
   def drops(world: World, x: Int, y: Int, z: Int, fortune: Int): Option[java.util.ArrayList[ItemStack]] = None
 
+  def explosionResistance(entity: Entity, world: World, x: Int, y: Int, z: Int, explosionX: Double, explosionY: Double, explosionZ: Double): Float = parent.getExplosionResistance(entity)
+
   def isNormalCube(world: World, x: Int, y: Int, z: Int) = true
 
   def validRotations(world: World, x: Int, y: Int, z: Int) = validRotations_
diff --git a/src/main/java/li/cil/oc/common/block/Delegator.scala b/src/main/java/li/cil/oc/common/block/Delegator.scala
index 8cb97b590..511ae7a38 100644
--- a/src/main/java/li/cil/oc/common/block/Delegator.scala
+++ b/src/main/java/li/cil/oc/common/block/Delegator.scala
@@ -46,7 +46,7 @@ class Delegator[Child <: Delegate](id: Int) extends Block(id, Material.iron) {
         subBlock(block.getMetadata(stack.getItemDamage))
       case _ => None
     }
-  else None
+    else None
 
   def subBlock(world: IBlockAccess, x: Int, y: Int, z: Int): Option[Child] =
     if (world.getBlockId(x, y, z) == blockID) subBlock(world.getBlockMetadata(x, y, z))
@@ -134,6 +134,12 @@ class Delegator[Child <: Delegate](id: Int) extends Block(id, Material.iron) {
     dropBlockAsItem_do(world, x, y, z, stack)
   }
 
+  override def getExplosionResistance(entity: Entity, world: World, x: Int, y: Int, z: Int, explosionX: Double, explosionY: Double, explosionZ: Double) =
+    subBlock(world, x, y, z) match {
+      case Some(subBlock) => subBlock.explosionResistance(entity, world, x, y, z, explosionX, explosionY, explosionZ)
+      case _ => super.getExplosionResistance(entity, world, x, y, z, explosionX, explosionY, explosionZ)
+    }
+
   override def isBlockNormalCube(world: World, x: Int, y: Int, z: Int) =
     subBlock(world.getBlockMetadata(x, y, z)) match {
       case Some(subBlock) => subBlock.isNormalCube(world, x, y, z)
diff --git a/src/main/java/li/cil/oc/common/block/RobotProxy.scala b/src/main/java/li/cil/oc/common/block/RobotProxy.scala
index 6a7f8ce60..e901aa99d 100644
--- a/src/main/java/li/cil/oc/common/block/RobotProxy.scala
+++ b/src/main/java/li/cil/oc/common/block/RobotProxy.scala
@@ -8,7 +8,7 @@ import li.cil.oc.server.component.robot
 import li.cil.oc.util.Tooltip
 import li.cil.oc.{Blocks, Settings, OpenComputers}
 import net.minecraft.client.renderer.texture.IconRegister
-import net.minecraft.entity.EntityLivingBase
+import net.minecraft.entity.{Entity, EntityLivingBase}
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.item.{EnumRarity, ItemStack}
 import net.minecraft.util.{Icon, MovingObjectPosition, AxisAlignedBB, Vec3}
@@ -71,6 +71,8 @@ class RobotProxy(val parent: SpecialDelegator) extends RedstoneAware with Specia
 
   // ----------------------------------------------------------------------- //
 
+  override def explosionResistance(entity: Entity, world: World, x: Int, y: Int, z: Int, explosionX: Double, explosionY: Double, explosionZ: Double) = 10f
+
   override def isNormalCube(world: World, x: Int, y: Int, z: Int) = false
 
   override def isSolid(world: IBlockAccess, x: Int, y: Int, z: Int, side: ForgeDirection) = false
diff --git a/src/main/java/li/cil/oc/common/component/Buffer.scala b/src/main/java/li/cil/oc/common/component/Buffer.scala
index 97fc4daa0..9e028c53a 100644
--- a/src/main/java/li/cil/oc/common/component/Buffer.scala
+++ b/src/main/java/li/cil/oc/common/component/Buffer.scala
@@ -118,7 +118,8 @@ class Buffer(val owner: Buffer.Owner) extends api.network.Environment {
     buffer.load(nbt.getCompoundTag("buffer"))
   }
 
-  def save(nbt: NBTTagCompound) = {
+  // Null check for Waila (and other mods that may call this client side).
+  def save(nbt: NBTTagCompound) = if (node != null) {
     // Happy thread synchronization hack! Here's the problem: GPUs allow direct
     // calls for modifying screens to give a more responsive experience. This
     // causes the following problem: when saving, if the screen is saved first,
diff --git a/src/main/java/li/cil/oc/common/tileentity/Case.scala b/src/main/java/li/cil/oc/common/tileentity/Case.scala
index 973598b0f..da462b0bd 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Case.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Case.scala
@@ -1,5 +1,6 @@
 package li.cil.oc.common.tileentity
 
+import cpw.mods.fml.relauncher.{SideOnly, Side}
 import li.cil.oc.Settings
 import li.cil.oc.api.driver
 import li.cil.oc.api.driver.Slot
@@ -7,10 +8,16 @@ import li.cil.oc.server.driver.Registry
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.NBTTagCompound
+import net.minecraftforge.common.ForgeDirection
 
 class Case(var tier: Int, isRemote: Boolean) extends Computer(isRemote) {
   def this() = this(0, false)
 
+  @SideOnly(Side.CLIENT)
+  override protected def hasConnector(side: ForgeDirection) = side != facing
+
+  override protected def connector(side: ForgeDirection) = Option(if (side != facing && computer != null) computer.node else null)
+
   var maxComponents = 0
 
   def recomputeMaxComponents() {
diff --git a/src/main/java/li/cil/oc/common/tileentity/Environment.scala b/src/main/java/li/cil/oc/common/tileentity/Environment.scala
index bb82a84a6..7a97508af 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Environment.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Environment.scala
@@ -1,14 +1,71 @@
 package li.cil.oc.common.tileentity
 
+import cpw.mods.fml.common.Optional
 import li.cil.oc.Settings
-import li.cil.oc.api.network.SidedEnvironment
+import li.cil.oc.api.network.{Connector, SidedEnvironment}
 import li.cil.oc.api.{Network, network}
 import li.cil.oc.util.ExtendedNBT._
 import net.minecraft.nbt.NBTTagCompound
 import net.minecraftforge.common.ForgeDirection
 import scala.math.ScalaNumber
+import universalelectricity.api.UniversalClass
+import universalelectricity.api.energy.{IEnergyContainer, IEnergyInterface}
+import cpw.mods.fml.relauncher.{Side, SideOnly}
 
-abstract class Environment extends TileEntity with network.Environment {
+// Because @UniversalClass injects custom invalidate and validate methods for
+// IC2 setup/teardown we have to use a base class and implement our own logic
+// in a child class. This also means we can't use the Environment base class,
+// since mixins are linked up at compile time, whereas UniversalClass injects
+// its methods at runtime.
+@UniversalClass
+@Optional.InterfaceList(Array(
+  new Optional.Interface(iface = "universalelectricity.api.energy.IEnergyInterface", modid = "UniversalElectricity"),
+  new Optional.Interface(iface = "universalelectricity.api.energy.IEnergyContainer", modid = "UniversalElectricity")
+))
+abstract class PowerAcceptor extends TileEntity with network.Environment with IEnergyInterface with IEnergyContainer {
+  override def canConnect(direction: ForgeDirection, source: AnyRef) =
+    (if (isClient) hasConnector(direction) else connector(direction).isDefined) &&
+      direction != null && direction != ForgeDirection.UNKNOWN
+
+  override def onReceiveEnergy(from: ForgeDirection, receive: Long, doReceive: Boolean) = connector(from) match {
+    case Some(node) if !Settings.get.ignorePower =>
+      val energy = fromUE(receive)
+      if (doReceive) {
+        val surplus = node.changeBuffer(energy)
+        receive - toUE(surplus)
+      }
+      else {
+        val space = node.globalBufferSize - node.globalBuffer
+        math.min(receive, toUE(space))
+      }
+    case _ => 0
+  }
+
+  override def onExtractEnergy(from: ForgeDirection, extract: Long, doExtract: Boolean) = 0
+
+  override def setEnergy(from: ForgeDirection, energy: Long) {}
+
+  override def getEnergy(from: ForgeDirection) = connector(from) match {
+    case Some(node) => toUE(node.globalBuffer)
+    case _ => 0
+  }
+
+  override def getEnergyCapacity(from: ForgeDirection) = connector(from) match {
+    case Some(node) => toUE(node.globalBufferSize)
+    case _ => 0
+  }
+
+  protected def toUE(energy: Double) = (energy * Settings.ratioBC).toLong
+
+  protected def fromUE(energy: Long) = energy / Settings.ratioBC
+
+  @SideOnly(Side.CLIENT)
+  protected def hasConnector(side: ForgeDirection) = false
+
+  protected def connector(side: ForgeDirection): Option[Connector] = None
+}
+
+abstract class Environment extends PowerAcceptor {
   protected var addedToNetwork = false
 
   // ----------------------------------------------------------------------- //
diff --git a/src/main/java/li/cil/oc/common/tileentity/Hologram.scala b/src/main/java/li/cil/oc/common/tileentity/Hologram.scala
index e7770e6ca..b57429bca 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Hologram.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Hologram.scala
@@ -60,6 +60,7 @@ class Hologram extends Environment with SidedEnvironment {
 
   // ----------------------------------------------------------------------- //
 
+  @SideOnly(Side.CLIENT)
   override def canConnect(side: ForgeDirection) = side != ForgeDirection.UP
 
   override def sidedNode(side: ForgeDirection) = node
diff --git a/src/main/java/li/cil/oc/common/tileentity/Hub.scala b/src/main/java/li/cil/oc/common/tileentity/Hub.scala
index 69ede28ce..050950416 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Hub.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Hub.scala
@@ -17,7 +17,7 @@ trait Hub extends Environment with SidedEnvironment {
   @SideOnly(Side.CLIENT)
   override def canConnect(side: ForgeDirection) = true
 
-  override def sidedNode(side: ForgeDirection) = plugs(side.ordinal()).node
+  override def sidedNode(side: ForgeDirection) = if (side != ForgeDirection.UNKNOWN) plugs(side.ordinal()).node else null
 
   // ----------------------------------------------------------------------- //
 
@@ -30,11 +30,14 @@ trait Hub extends Environment with SidedEnvironment {
 
   override def writeToNBT(nbt: NBTTagCompound) {
     super.writeToNBT(nbt)
-    nbt.setNewTagList(Settings.namespace + "plugs", plugs.map(plug => {
-      val plugNbt = new NBTTagCompound()
-      plug.node.save(plugNbt)
-      plugNbt
-    }))
+    // Side check for Waila (and other mods that may call this client side).
+    if (isServer) {
+      nbt.setNewTagList(Settings.namespace + "plugs", plugs.map(plug => {
+        val plugNbt = new NBTTagCompound()
+        plug.node.save(plugNbt)
+        plugNbt
+      }))
+    }
   }
 
   // ----------------------------------------------------------------------- //
diff --git a/src/main/java/li/cil/oc/common/tileentity/PowerConverter.scala b/src/main/java/li/cil/oc/common/tileentity/PowerConverter.scala
index 7eea67c4b..e5764274a 100644
--- a/src/main/java/li/cil/oc/common/tileentity/PowerConverter.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/PowerConverter.scala
@@ -1,113 +1,20 @@
 package li.cil.oc.common.tileentity
 
-import cpw.mods.fml.common.Optional
+import cpw.mods.fml.relauncher.{SideOnly, Side}
 import li.cil.oc.api.network._
-import li.cil.oc.api.{Network, network}
-import li.cil.oc.util.ExtendedNBT._
 import li.cil.oc.{Settings, api}
 import net.minecraft.entity.player.EntityPlayer
-import net.minecraft.nbt.NBTTagCompound
 import net.minecraftforge.common.ForgeDirection
-import universalelectricity.api.UniversalClass
-import universalelectricity.api.energy.{IEnergyContainer, IEnergyInterface}
 
-// Because @UniversalClass injects custom invalidate and validate methods for
-// IC2 setup/teardown we have to use a base class and implement our own logic
-// in a child class. This also means we can't use the Environment base class,
-// since mixins are linked up at compile time, whereas UniversalClass injects
-// its methods at runtime.
-@UniversalClass
-@Optional.InterfaceList(Array(
-  new Optional.Interface(iface = "universalelectricity.api.energy.IEnergyInterface", modid = "UniversalElectricity"),
-  new Optional.Interface(iface = "universalelectricity.api.energy.IEnergyContainer", modid = "UniversalElectricity")
-))
-abstract class PowerConverterBase extends TileEntity with network.Environment with IEnergyInterface with IEnergyContainer {
-  override def node: Connector
-
-  def canConnect(direction: ForgeDirection) = direction != null && direction != ForgeDirection.UNKNOWN
-
-  override def canConnect(direction: ForgeDirection, source: AnyRef) = canConnect(direction)
-
-  override def onReceiveEnergy(from: ForgeDirection, receive: Long, doReceive: Boolean) = {
-    if (!Settings.get.ignorePower && node != null) {
-      val energy = fromUE(receive)
-      if (doReceive) {
-        val surplus = node.changeBuffer(energy)
-        receive - toUE(surplus)
-      }
-      else {
-        val space = node.globalBufferSize - node.globalBuffer
-        math.min(receive, toUE(space))
-      }
-    }
-    else 0
-  }
-
-  override def onExtractEnergy(from: ForgeDirection, extract: Long, doExtract: Boolean) = 0
-
-  override def setEnergy(from: ForgeDirection, energy: Long) {}
-
-  override def getEnergy(from: ForgeDirection) = if (node != null) toUE(node.globalBuffer) else 0
-
-  override def getEnergyCapacity(from: ForgeDirection) = if (node != null) toUE(node.globalBufferSize) else Long.MaxValue
-
-  protected def toUE(energy: Double) = (energy * Settings.ratioBC).toLong
-
-  protected def fromUE(energy: Long) = energy / Settings.ratioBC
-}
-
-class PowerConverter extends PowerConverterBase with Analyzable {
+class PowerConverter extends Environment with Analyzable {
   val node = api.Network.newNode(this, Visibility.Network).
     withConnector(Settings.get.bufferConverter).
     create()
 
-  protected var addedToNetwork = false
+  @SideOnly(Side.CLIENT)
+  override protected def hasConnector(side: ForgeDirection) = true
 
-  // ----------------------------------------------------------------------- //
+  override protected def connector(side: ForgeDirection) = Option(node)
 
   override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) = null
-
-  // ----------------------------------------------------------------------- //
-
-  override def updateEntity() {
-    super.updateEntity()
-    if (!addedToNetwork) {
-      addedToNetwork = true
-      Network.joinOrCreateNetwork(this)
-    }
-  }
-
-  override def onChunkUnload() {
-    super.onChunkUnload()
-    Option(node).foreach(_.remove)
-  }
-
-  override def invalidate() {
-    super.invalidate()
-    Option(node).foreach(_.remove)
-  }
-
-  // ----------------------------------------------------------------------- //
-
-  override def readFromNBT(nbt: NBTTagCompound) {
-    super.readFromNBT(nbt)
-    if (node != null) {
-      node.load(nbt.getCompoundTag(Settings.namespace + "node"))
-    }
-  }
-
-  override def writeToNBT(nbt: NBTTagCompound) {
-    super.writeToNBT(nbt)
-    if (node != null) {
-      nbt.setNewCompoundTag(Settings.namespace + "node", node.save)
-    }
-  }
-
-  // ----------------------------------------------------------------------- //
-
-  override def onMessage(message: network.Message) {}
-
-  override def onConnect(node: network.Node) {}
-
-  override def onDisconnect(node: network.Node) {}
 }
diff --git a/src/main/java/li/cil/oc/common/tileentity/PowerDistributor.scala b/src/main/java/li/cil/oc/common/tileentity/PowerDistributor.scala
index eda2ae94f..16daea9db 100644
--- a/src/main/java/li/cil/oc/common/tileentity/PowerDistributor.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/PowerDistributor.scala
@@ -36,10 +36,13 @@ class PowerDistributor extends Environment with PowerBalancer with Analyzable {
 
   override def writeToNBT(nbt: NBTTagCompound) {
     super.writeToNBT(nbt)
-    nbt.setNewTagList(Settings.namespace + "connector", nodes.map(connector => {
-      val connectorNbt = new NBTTagCompound()
-      connector.save(connectorNbt)
-      connectorNbt
-    }))
+    // Side check for Waila (and other mods that may call this client side).
+    if (isServer) {
+      nbt.setNewTagList(Settings.namespace + "connector", nodes.map(connector => {
+        val connectorNbt = new NBTTagCompound()
+        connector.save(connectorNbt)
+        connectorNbt
+      }))
+    }
   }
 }
diff --git a/src/main/java/li/cil/oc/common/tileentity/Rack.scala b/src/main/java/li/cil/oc/common/tileentity/Rack.scala
index f98146a59..0f29aa9b8 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Rack.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Rack.scala
@@ -36,6 +36,11 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
   // For client side rendering.
   var isPresent = Array.fill[Option[String]](getSizeInventory)(None)
 
+  @SideOnly(Side.CLIENT)
+  override protected def hasConnector(side: ForgeDirection) = side != facing
+
+  override protected def connector(side: ForgeDirection) = Option(if (side != facing) sidedNode(side).asInstanceOf[Connector] else null)
+
   // ----------------------------------------------------------------------- //
 
   override def canConnect(side: ForgeDirection) = side != facing
@@ -220,7 +225,8 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
     range = nbt.getInteger(Settings.namespace + "range")
   }
 
-  override def writeToNBT(nbt: NBTTagCompound) {
+  // Side check for Waila (and other mods that may call this client side).
+  override def writeToNBT(nbt: NBTTagCompound) = if (isServer) {
     if (!new Exception().getStackTrace.exists(_.getClassName.startsWith("mcp.mobius.waila"))) {
       nbt.setNewTagList(Settings.namespace + "servers", servers map {
         case Some(server) =>
diff --git a/src/main/java/li/cil/oc/common/tileentity/Robot.scala b/src/main/java/li/cil/oc/common/tileentity/Robot.scala
index 054811d5b..8ebdcda6c 100644
--- a/src/main/java/li/cil/oc/common/tileentity/Robot.scala
+++ b/src/main/java/li/cil/oc/common/tileentity/Robot.scala
@@ -338,7 +338,8 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
     }
   }
 
-  override def writeToNBT(nbt: NBTTagCompound) = this.synchronized {
+  // Side check for Waila (and other mods that may call this client side).
+  override def writeToNBT(nbt: NBTTagCompound) = if (isServer) this.synchronized {
     // Note: computer is saved when proxy is saved (in proxy's super writeToNBT)
     // which is a bit ugly, and may be refactored some day, but it works.
     nbt.setNewCompoundTag(Settings.namespace + "buffer", buffer.save)
diff --git a/src/main/java/li/cil/oc/server/component/Server.scala b/src/main/java/li/cil/oc/server/component/Server.scala
index 24062b99c..5a4aed594 100644
--- a/src/main/java/li/cil/oc/server/component/Server.scala
+++ b/src/main/java/li/cil/oc/server/component/Server.scala
@@ -26,9 +26,9 @@ class Server(val rack: tileentity.Rack, val number: Int) extends Machine.Owner {
 
   // ----------------------------------------------------------------------- //
 
-  override def address() = machine.node.address
+  override def address = machine.node.address
 
-  override def node() = machine.node
+  override def node = machine.node
 
   override def start() = machine.start()
 
diff --git a/src/main/java/li/cil/oc/server/fs/Capacity.scala b/src/main/java/li/cil/oc/server/fs/Capacity.scala
index f0a9d2fdd..3e39e005b 100644
--- a/src/main/java/li/cil/oc/server/fs/Capacity.scala
+++ b/src/main/java/li/cil/oc/server/fs/Capacity.scala
@@ -78,6 +78,9 @@ trait Capacity extends OutputStreamFileSystem {
       case None => None
       case Some(stream) =>
         used += delta
+        if (mode == Mode.Append) {
+          stream.seek(stream.length())
+        }
         Some(new CountingOutputHandle(this, stream))
     }
   }
diff --git a/src/main/java/li/cil/oc/server/fs/FileOutputStreamFileSystem.scala b/src/main/java/li/cil/oc/server/fs/FileOutputStreamFileSystem.scala
index 0e43ddc0f..de1eaa9a6 100644
--- a/src/main/java/li/cil/oc/server/fs/FileOutputStreamFileSystem.scala
+++ b/src/main/java/li/cil/oc/server/fs/FileOutputStreamFileSystem.scala
@@ -23,8 +23,7 @@ trait FileOutputStreamFileSystem extends FileInputStreamFileSystem with OutputSt
 
   override protected def openOutputHandle(id: Int, path: String, mode: Mode): Option[OutputHandle] =
     Some(new FileHandle(new RandomAccessFile(new io.File(root, path), mode match {
-      case Mode.Append => "a"
-      case Mode.Write => "w"
+      case Mode.Append | Mode.Write => "rw"
       case _ => throw new IllegalArgumentException()
     }), this, id, path))
 
diff --git a/src/main/java/li/cil/oc/util/LuaStateFactory.scala b/src/main/java/li/cil/oc/util/LuaStateFactory.scala
index 19722d9cf..6c3066800 100644
--- a/src/main/java/li/cil/oc/util/LuaStateFactory.scala
+++ b/src/main/java/li/cil/oc/util/LuaStateFactory.scala
@@ -86,14 +86,16 @@ object LuaStateFactory {
     isWindows = extension == ".dll"
     val libPath = "/assets/" + Settings.resourceDomain + "/lib/"
 
-    if (isWindows && SystemUtils.IS_OS_WINDOWS_XP) {
-      OpenComputers.log.warning("Sorry, but Windows XP isn't supported. I'm afraid you'll have to use a newer Windows. I very much recommend upgrading your Windows, anyway, since Microsoft will stop supporting Windows XP in April 2014.")
-      break()
-    }
+    if (isWindows && !Settings.get.alwaysTryNative) {
+      if (SystemUtils.IS_OS_WINDOWS_XP) {
+        OpenComputers.log.warning("Sorry, but Windows XP isn't supported. I'm afraid you'll have to use a newer Windows. I very much recommend upgrading your Windows, anyway, since Microsoft will stop supporting Windows XP in April 2014.")
+        break()
+      }
 
-    if (isWindows && SystemUtils.IS_OS_WINDOWS_2003) {
-      OpenComputers.log.warning("Sorry, but Windows Server 2003 isn't supported. I'm afraid you'll have to use a newer Windows.")
-      break()
+      if (SystemUtils.IS_OS_WINDOWS_2003) {
+        OpenComputers.log.warning("Sorry, but Windows Server 2003 isn't supported. I'm afraid you'll have to use a newer Windows.")
+        break()
+      }
     }
 
     val tmpPath = {
diff --git a/src/main/resources/reference.conf b/src/main/resources/reference.conf
index a7402249c..06994c155 100644
--- a/src/main/resources/reference.conf
+++ b/src/main/resources/reference.conf
@@ -689,5 +689,13 @@ opencomputers {
       # if a new version is available (contacts Github once the first player
       # joins a server / the first map in single player is opened).
       updateCheck: true
+
+      # On some platforms the native library can crash the game, so there are
+      # a few checks in place to avoid trying to load it in those cases. This
+      # is Windows XP and Windows Server 2003, right. If you think it might
+      # work nonetheless (never builds of Server2k3 e.g.) you might want to
+      # try setting this to `true`. Use this at your own risk. If the game
+      # crashes as a result of setting this to `true` DO NOT REPORT IT.
+      alwaysTryNative: false
   }
 }
\ No newline at end of file