diff --git a/OpenRA.Game/Game.cs b/OpenRA.Game/Game.cs
index 649b76561a..7d97c06b78 100644
--- a/OpenRA.Game/Game.cs
+++ b/OpenRA.Game/Game.cs
@@ -34,6 +34,7 @@ using OpenRA.Support;
 using OpenRA.Traits;
 using Timer = OpenRA.Support.Timer;
 using XRandom = OpenRA.Thirdparty.Random;
+using System.Text;
 
 namespace OpenRA
 {
@@ -204,6 +205,50 @@ namespace OpenRA
 		public static int LocalTick = 0;
 		const int NetTickScale = 3;		// 120ms net tick for 40ms local tick
 
+		static Queue<Pair<int, string>> syncReports = new Queue<Pair<int, string>>();
+		const int numSyncReports = 5;
+
+		static void UpdateSyncReport()
+		{
+			if (!Settings.RecordSyncReports)
+				return;
+
+			while (syncReports.Count >= numSyncReports) syncReports.Dequeue();
+			syncReports.Enqueue(Pair.New(orderManager.FrameNumber, GenerateSyncReport()));
+		}
+
+		static string GenerateSyncReport()
+		{
+			var sb = new StringBuilder();
+			sb.AppendLine("Actors:");
+			foreach (var a in Game.world.Actors)
+				sb.AppendLine("\t {0} {1} {2} ({3})".F(
+					a.ActorID,
+					a.Info.Name,
+					(a.Owner == null) ? "null" : a.Owner.InternalName,
+					Sync.CalculateSyncHash(a)));
+
+			sb.AppendLine("Tick Actors:");
+			foreach (var a in Game.world.Queries.WithTraitMultiple<ITick>())
+				sb.AppendLine("\t {0} {1} {2} {3} ({4})".F(
+					a.Actor.ActorID,
+					a.Actor.Info.Name,
+					(a.Actor.Owner == null) ? "null" : a.Actor.Owner.InternalName,
+					a.Trait.GetType().Name,
+					Sync.CalculateSyncHash(a.Trait)));
+
+			return sb.ToString();
+		}
+
+		public static void DumpSyncReport()
+		{
+			foreach (var f in syncReports)
+			{
+				Log.Write("Sync for net frame {0} -------------", f.First);
+				Log.Write("{0}", f.Second);
+			}
+		}
+
 		public static void Tick()
 		{
 			if (packageChangePending)
@@ -246,6 +291,9 @@ namespace OpenRA
 
 						world.Tick();
 
+						if (isNetTick)
+							UpdateSyncReport();
+
 						PerfHistory.Tick();
 					}
 					else
diff --git a/OpenRA.Game/GameRules/UserSettings.cs b/OpenRA.Game/GameRules/UserSettings.cs
index c68ff8d6ab..f5048085d9 100644
--- a/OpenRA.Game/GameRules/UserSettings.cs
+++ b/OpenRA.Game/GameRules/UserSettings.cs
@@ -27,6 +27,7 @@ namespace OpenRA.GameRules
 		public bool PathDebug = false;
 		public bool PerfDebug = true;
 		public bool IndexDebug = false;
+		public bool RecordSyncReports = false;
 		
 		// Window settings
 		public readonly int Width = 0;
diff --git a/OpenRA.Game/Network/OrderManager.cs b/OpenRA.Game/Network/OrderManager.cs
index bcf1bbd97b..c80985854e 100755
--- a/OpenRA.Game/Network/OrderManager.cs
+++ b/OpenRA.Game/Network/OrderManager.cs
@@ -24,6 +24,7 @@ using System.IO;
 using System.Linq;
 using OpenRA.FileFormats;
 using OpenRA.Traits;
+using System.Text;
 
 namespace OpenRA.Network
 {
@@ -118,7 +119,7 @@ namespace OpenRA.Network
 			{
 				if( packet.Length != existingSync.Length )
 				{
-					DumpActors();
+					Game.DumpSyncReport();
 					OutOfSync( frame );
 				}
 				else
@@ -127,7 +128,7 @@ namespace OpenRA.Network
 					{
 						if( packet[ i ] != existingSync[ i ] )
 						{
-							DumpActors();
+							Game.DumpSyncReport();
 
 							if ( i < SyncHeaderSize )
 								OutOfSync(frame, "Tick");
@@ -141,17 +142,6 @@ namespace OpenRA.Network
 				syncForFrame.Add( frame, packet );
 		}
 
-		static void DumpActors()
-		{
-			Log.Write( "Actors:" );
-			foreach( var a in Game.world.Actors )
-				Log.Write( "\t {0} {1} {2} ({3})", a.ActorID, a.Info.Name, ( a.Owner == null ) ? "null" : a.Owner.InternalName, Sync.CalculateSyncHash( a ) );
-
-			Log.Write( "Tick Actors:" );
-			foreach( var a in Game.world.Queries.WithTraitMultiple<ITick>() )
-				Log.Write( "\t {0} {1} {2} {3} ({4})", a.Actor.ActorID, a.Actor.Info.Name, ( a.Actor.Owner == null ) ? "null" : a.Actor.Owner.InternalName, a.Trait.GetType().Name, Sync.CalculateSyncHash( a.Trait ) );
-		}
-
 		void OutOfSync( int frame , int index)
 		{	
 			var frameData = clientQuitTimes
diff --git a/OpenRA.Game/Widgets/Delegates/SettingsMenuDelegate.cs b/OpenRA.Game/Widgets/Delegates/SettingsMenuDelegate.cs
index 45e46c8df0..b6777a3b81 100644
--- a/OpenRA.Game/Widgets/Delegates/SettingsMenuDelegate.cs
+++ b/OpenRA.Game/Widgets/Delegates/SettingsMenuDelegate.cs
@@ -14,25 +14,32 @@ namespace OpenRA.Widgets.Delegates
 			// Checkboxes		
 			r.GetWidget<CheckboxWidget>("SETTINGS_CHECKBOX_UNITDEBUG").Checked = () => {return Game.Settings.UnitDebug;};
 			r.GetWidget("SETTINGS_CHECKBOX_UNITDEBUG").OnMouseDown = mi => {
-				Game.Settings.UnitDebug = !Game.Settings.UnitDebug;
+				Game.Settings.UnitDebug ^= true;
 				return true;
 			};
 			
 			r.GetWidget<CheckboxWidget>("SETTINGS_CHECKBOX_PATHDEBUG").Checked = () => {return Game.Settings.PathDebug;};
 			r.GetWidget("SETTINGS_CHECKBOX_PATHDEBUG").OnMouseDown = mi => {
-				Game.Settings.PathDebug = !Game.Settings.PathDebug;
+				Game.Settings.PathDebug ^= true;
 				return true;
 			};
 			
 			r.GetWidget<CheckboxWidget>("SETTINGS_CHECKBOX_INDEXDEBUG").Checked = () => {return Game.Settings.IndexDebug;};
 			r.GetWidget("SETTINGS_CHECKBOX_INDEXDEBUG").OnMouseDown = mi => {
-				Game.Settings.IndexDebug = !Game.Settings.IndexDebug;
+				Game.Settings.IndexDebug ^= true;
 				return true;
 			};
 			
 			r.GetWidget<CheckboxWidget>("SETTINGS_CHECKBOX_PERFDEBUG").Checked = () => {return Game.Settings.PerfDebug;};
 			r.GetWidget("SETTINGS_CHECKBOX_PERFDEBUG").OnMouseDown = mi => {
-				Game.Settings.PerfDebug = !Game.Settings.PerfDebug;
+				Game.Settings.PerfDebug ^= true;
+				return true;
+			};
+
+			r.GetWidget<CheckboxWidget>("SETTINGS_CHECKBOX_SYNCREPORTS").Checked = () => { return Game.Settings.RecordSyncReports; };
+			r.GetWidget("SETTINGS_CHECKBOX_SYNCREPORTS").OnMouseDown = mi =>
+			{
+				Game.Settings.RecordSyncReports ^= true;
 				return true;
 			};
 						
diff --git a/mods/ra/menus.yaml b/mods/ra/menus.yaml
index 93b2067ef1..d7a38fc793 100644
--- a/mods/ra/menus.yaml
+++ b/mods/ra/menus.yaml
@@ -97,7 +97,7 @@ Container:
 			X:(WINDOW_RIGHT - WIDTH)/2
 			Y:(WINDOW_BOTTOM- HEIGHT)/2
 			Width: 450
-			Height: 300
+			Height: 350
 			Visible: false
 			Children:
 				Label@SETTINGS_LABEL_TITLE:
@@ -136,6 +136,13 @@ Container:
 					Width:300
 					Height:20
 					Text:Show Performance Information
+				Checkbox@SETTINGS_CHECKBOX_SYNCREPORTS:
+					Id:SETTINGS_CHECKBOX_SYNCREPORTS
+					X:100
+					Y:180
+					Width:300
+					Height:20
+					Text:Collect Sync Reports
 				Button@SETTINGS_BUTTON_OK:
 					Id:SETTINGS_BUTTON_OK
 					X:PARENT_RIGHT - 180