diff --git a/src/main/scala/li/cil/oc/OpenComputers.scala b/src/main/scala/li/cil/oc/OpenComputers.scala
index a71bb7bde..3e7a45d2b 100644
--- a/src/main/scala/li/cil/oc/OpenComputers.scala
+++ b/src/main/scala/li/cil/oc/OpenComputers.scala
@@ -37,8 +37,8 @@ object OpenComputers {
 
   @EventHandler
   def preInit(e: FMLPreInitializationEvent) {
-    proxy.preInit(e)
     log = e.getModLog
+    proxy.preInit(e)
   }
 
   @EventHandler
diff --git a/src/main/scala/li/cil/oc/common/tileentity/Robot.scala b/src/main/scala/li/cil/oc/common/tileentity/Robot.scala
index 79290b6ba..0b46e53f8 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/Robot.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/Robot.scala
@@ -521,7 +521,7 @@ class Robot extends traits.Computer with traits.PowerInformation with api.machin
     case _ => false
   })
 
-  def isUpgradeSlot(slot: Int) = false // slot == 3 TODO upgrade synching for rendering
+  def isUpgradeSlot(slot: Int) = containerSlotType(slot) == Slot.Upgrade
 
   // ----------------------------------------------------------------------- //
 
diff --git a/src/main/scala/li/cil/oc/server/component/robot/Robot.scala b/src/main/scala/li/cil/oc/server/component/robot/Robot.scala
index f0afef3bb..b65fd2162 100644
--- a/src/main/scala/li/cil/oc/server/component/robot/Robot.scala
+++ b/src/main/scala/li/cil/oc/server/component/robot/Robot.scala
@@ -312,6 +312,7 @@ class Robot(val robot: tileentity.Robot) extends ManagedComponent {
       (broke, "block")
     }
 
+    var reason: Option[String] = None
     for (side <- sides) {
       val player = robot.player(facing, side)
       player.setSneaking(sneaky)
@@ -341,9 +342,10 @@ class Robot(val robot: tileentity.Robot) extends ManagedComponent {
       if (success) {
         return result(true, what)
       }
+      reason = reason.orElse(Option(what))
     }
 
-    result(false)
+    result(false, reason.orNull)
   }
 
   @Callback