diff --git a/ClassicalSharp/2D/Screens/Menu/HacksSettingsScreen.cs b/ClassicalSharp/2D/Screens/Menu/HacksSettingsScreen.cs
index d66d422f4..b1e55d2b1 100644
--- a/ClassicalSharp/2D/Screens/Menu/HacksSettingsScreen.cs
+++ b/ClassicalSharp/2D/Screens/Menu/HacksSettingsScreen.cs
@@ -96,7 +96,6 @@ namespace ClassicalSharp {
 			buttons[3].Disabled = noGlobalHacks || !p.CanSpeed;
 			buttons[4].Disabled = noGlobalHacks || !p.CanSpeed;
 			buttons[6].Disabled = noGlobalHacks || !p.CanPushbackBlocks;
-			buttons[4].Disabled = true; // TODO: get this working
 		}
 		
 		ButtonWidget Make( int x, int y, string text, Action<Game, Widget> onClick,
diff --git a/ClassicalSharp/ClassicalSharp.csproj b/ClassicalSharp/ClassicalSharp.csproj
index 5100e6df1..bf2630c25 100644
--- a/ClassicalSharp/ClassicalSharp.csproj
+++ b/ClassicalSharp/ClassicalSharp.csproj
@@ -66,6 +66,7 @@
     <DefineConstants>TRACE;USE_DX</DefineConstants>
     <BaseIntermediateOutputPath>obj\</BaseIntermediateOutputPath>
     <StartAction>Project</StartAction>
+    <StartArguments>wwwf ver 127.0.0.1 25565</StartArguments>
   </PropertyGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
   <ItemGroup>
diff --git a/ClassicalSharp/Entities/LocalPlayer.Physics.cs b/ClassicalSharp/Entities/LocalPlayer.Physics.cs
index 9ad10afc5..f0056ef4d 100644
--- a/ClassicalSharp/Entities/LocalPlayer.Physics.cs
+++ b/ClassicalSharp/Entities/LocalPlayer.Physics.cs
@@ -69,13 +69,13 @@ namespace ClassicalSharp {
 			} else if( TouchesAnyRope() ) {
 				Velocity.Y += speeding ? 0.15f : 0.10f;
 				canLiquidJump = false;
-			} else if( onGround ) {
-				Velocity.Y = 0;
+			} else if( onGround ) {				
 				DoNormalJump();
 			}
 		}
 		
 		void DoNormalJump() {
+			Velocity.Y = 0;
 			Velocity.Y += jumpVel;
 			if( speeding ) Velocity.Y += jumpVel;
 			if( halfSpeeding ) Velocity.Y += jumpVel / 2;
@@ -96,10 +96,13 @@ namespace ClassicalSharp {
 		void PhysicsTick( float xMoving, float zMoving ) {
 			if( noClip )
 				onGround = false;
-			float multiply = GetBaseMultiply();
+			float multiply = GetBaseMultiply();			
 			float modifier = LowestSpeedModifier();
-			float horMul = multiply * modifier;
+			
 			float yMul = Math.Max( 1f, multiply / 5 ) * modifier;
+			float horMul = multiply * modifier;
+			if( !secondJump ) { horMul *= 93f; yMul *= 10f; }
+			else if( !firstJump ) { horMul *= 46.5f; yMul *= 7.5f; }
 			
 			if( TouchesAnyWater() && !flying && !noClip ) {
 				MoveNormal( xMoving, zMoving, 0.02f * horMul, waterDrag, liquidGrav, yMul );
diff --git a/ClassicalSharp/Entities/LocalPlayer.cs b/ClassicalSharp/Entities/LocalPlayer.cs
index b00df7d1c..4a1fad900 100644
--- a/ClassicalSharp/Entities/LocalPlayer.cs
+++ b/ClassicalSharp/Entities/LocalPlayer.cs
@@ -318,10 +318,10 @@ namespace ClassicalSharp {
 				noClip = !noClip;
 			} else if( key == keys[KeyBinding.Jump] && !onGround ) {
 				if( firstJump && CanDoubleJump && DoubleJump ) {
-					//DoNormalJump(); TODO: get this working
+					DoNormalJump();
 					firstJump = false;
 				} else if( secondJump && CanDoubleJump && DoubleJump ) {
-					//DoNormalJump(); TODO: get this working
+					DoNormalJump();
 					secondJump = false;
 				}
 			} else {
diff --git a/ClassicalSharp/Network/NetworkProcessor.CPE.cs b/ClassicalSharp/Network/NetworkProcessor.CPE.cs
index cec84e7bb..4d0aaf93c 100644
--- a/ClassicalSharp/Network/NetworkProcessor.CPE.cs
+++ b/ClassicalSharp/Network/NetworkProcessor.CPE.cs
@@ -58,14 +58,12 @@ namespace ClassicalSharp {
 		bool sendHeldBlock, useMessageTypes;
 		int envMapApperanceVer = 2;
 		static string[] clientExtensions = {
-			"ClickDistance", "CustomBlocks", "HeldBlock",
-			"EmoteFix", "TextHotKey", "ExtPlayerList",
-			"EnvColors", "SelectionCuboid", "BlockPermissions",
-			"ChangeModel", "EnvMapAppearance", "EnvWeatherType",
-			"HackControl", "MessageTypes", "PlayerClick",
-			"FullCP437", "LongerMessages",
+			"ClickDistance", "CustomBlocks", "HeldBlock", "EmoteFix", "TextHotKey", "ExtPlayerList",
+			"EnvColors", "SelectionCuboid", "BlockPermissions", "ChangeModel", "EnvMapAppearance", 
+			"EnvWeatherType", "HackControl", "MessageTypes", "PlayerClick", "FullCP437", 
+			"LongerMessages", "BlockDefinitions", "BlockDefinitionsExt",
 			// proposals
-			"BlockDefinitions", "BlockDefinitionsExt", "TextColors",
+			"BulkBlockUpdate", "TextColors",
 		};
 		
 		void HandleCpeExtInfo() {
@@ -499,7 +497,7 @@ namespace ClassicalSharp {
 				byte block = reader.buffer[i + bulkCount * sizeof(int)];
 				Vector3I coords = game.Map.GetCoords( indices[i] );
 				
-				if( !game.Map.IsValidPos( coords ) ) {
+				if( coords.X < 0 ) {
 					Utils.LogDebug( "Server tried to update a block at an invalid position!" );
 					continue;
 				}
diff --git a/ClassicalSharp/Network/Utils/AsyncDownloader.cs b/ClassicalSharp/Network/Utils/AsyncDownloader.cs
index 2a0e84e1b..600afd301 100644
--- a/ClassicalSharp/Network/Utils/AsyncDownloader.cs
+++ b/ClassicalSharp/Network/Utils/AsyncDownloader.cs
@@ -228,8 +228,8 @@ namespace ClassicalSharp.Network {
 		HttpWebRequest MakeRequest( Request request ) {
 			HttpWebRequest req = (HttpWebRequest)WebRequest.Create( request.Url );
 			req.AutomaticDecompression = DecompressionMethods.GZip;
-			req.ReadWriteTimeout = 15 * 1000;
-			req.Timeout = 15 * 1000;
+			req.ReadWriteTimeout = 90 * 1000;
+			req.Timeout = 90 * 1000;
 			req.Proxy = null;
 			req.UserAgent = Program.AppName;
 			
diff --git a/Launcher2/WebService/IWebTask.cs b/Launcher2/WebService/IWebTask.cs
index 93ab73ccd..cabbea514 100644
--- a/Launcher2/WebService/IWebTask.cs
+++ b/Launcher2/WebService/IWebTask.cs
@@ -40,8 +40,8 @@ namespace Launcher2 {
 		protected HttpWebResponse MakeRequest( string uri, string referer, string data ) {
 			HttpWebRequest request = (HttpWebRequest)WebRequest.Create( uri );
 			request.UserAgent = Program.AppName;
-			request.ReadWriteTimeout = 15 * 1000;
-			request.Timeout = 15 * 1000;
+			request.ReadWriteTimeout = 90 * 1000;
+			request.Timeout = 90 * 1000;
 			request.Referer = referer;
 			request.KeepAlive = true;
 			request.CookieContainer = cookies;