diff --git a/scripts/TWM2/Systems/DChalg.cs b/scripts/TWM2/Systems/DChalg.cs
index 6672245..981c529 100644
--- a/scripts/TWM2/Systems/DChalg.cs
+++ b/scripts/TWM2/Systems/DChalg.cs
@@ -101,30 +101,36 @@ function ChallengeDownload::onLine(%this, %line) {
 //////////////////////////////////////////////////
 
 function doChallengeKillRecording(%sourceObject, %targetObject) {
-   if(%sourceObject.team == %targetObject.team) {
-      //Teamkill = no recorded challenge :)
-      return;
-   }
-   //killed a player?
-   if(isClientControlledPlayer(%targetObject)) {
-      //echo("Kill: "@%sourceObject.client@"/"@%targetObject.lastDamagedImage@"");
-      recordAction(%sourceObject.client, "PKC", "single\t"@%targetObject.lastDamagedImage@"\t1");
-      recordAction(%sourceObject.client, "PKC", "total\t1");
-   }
-   else {
-      //killed a zombie
-      %zType = %targetObject.type;
-      if(!isSet(%zType)) {
-         //illegal target for challenge set, end here
-         return;
-      }
-      recordAction(%sourceObject.client, "ZKC", "total\t1");
-      recordAction(%sourceObject.client, "ZKC", "single\t"@%zType@"\t1");
-      recordAction(%sourceObject.client, "ZKC", "single\t"@%targetObject.lastDamagedImage@"\t"@%zType@"\t1");
-   }
+	if(%sourceObject $= "" || %targetObject $= "") {
+		return;
+	}
+	if(%sourceObject.team == %targetObject.team) {
+		//Teamkill = no recorded challenge :)
+		return;
+	}
+	//killed a player?
+	if(isClientControlledPlayer(%targetObject)) {
+		//echo("Kill: "@%sourceObject.client@"/"@%targetObject.lastDamagedImage@"");
+		recordAction(%sourceObject.client, "PKC", "single\t"@%targetObject.lastDamagedImage@"\t1");
+		recordAction(%sourceObject.client, "PKC", "total\t1");
+	}
+	else {
+		//killed a zombie
+		%zType = %targetObject.type;
+		if(!isSet(%zType)) {
+			//illegal target for challenge set, end here
+			return;
+		}
+		recordAction(%sourceObject.client, "ZKC", "total\t1");
+		recordAction(%sourceObject.client, "ZKC", "single\t"@%zType@"\t1");
+		recordAction(%sourceObject.client, "ZKC", "single\t"@%targetObject.lastDamagedImage@"\t"@%zType@"\t1");
+	}
 }
 
 function recordAction(%client, %action, %variables) {
+	if(!%client || %client $= "") {
+		return;
+	}
 	%ymd = formattimestring("yymmdd");
 	%so = %client.TWM2Controller;
 	checkDateOnChallenge(%client);
@@ -236,6 +242,9 @@ function allCheckCompletion(%client) {
 }
 
 function checkCompletion(%client, %cID) {
+	if(!%client || %client $= "") {
+		return;
+	}	
 	%challenge = $Challenges::Challenge[%cID];
 	%cType = trim(getField(%challenge, 0));
 	%cCond = getsubstr(getField(%challenge, 3), 1, strlen(getField(%challenge, 3)));
diff --git a/scripts/TWM2/Systems/NWChallengeIndex.cs b/scripts/TWM2/Systems/NWChallengeIndex.cs
index d97e329..4e1a684 100644
--- a/scripts/TWM2/Systems/NWChallengeIndex.cs
+++ b/scripts/TWM2/Systems/NWChallengeIndex.cs
@@ -770,6 +770,9 @@ $Challenge::IsNotMultiTier["SoulsticeBombard"] = true;
 
 //Core Functions
 function GameConnection::AllowedToDoNW(%client, %name) {
+	if(!%client || %client $= "") {
+		return 0;
+	}
 	if($Challenge::FlagDisabled[%name]) {
 		return 0;
 	}
@@ -798,6 +801,9 @@ function GameConnection::AllowedToDoNW(%client, %name) {
 }
 
 function GameConnection::CheckNWChallengeCompletion(%client, %name) {
+	if(!%client || %client $= "") {
+		return false;
+	}	
 	%scriptController = %client.TWM2Core;
 	if(%scriptController.challengeComplete[%name] == 1) {
 		return true;
diff --git a/scripts/TWM2/Systems/ObjectDamage.cs b/scripts/TWM2/Systems/ObjectDamage.cs
index e3c0739..12cd377 100644
--- a/scripts/TWM2/Systems/ObjectDamage.cs
+++ b/scripts/TWM2/Systems/ObjectDamage.cs
@@ -186,6 +186,10 @@ function postObjectDestroyed(%source, %targetObject, %dType, %dLoc) {
 		//Skip terrain and interiors
 		return;
 	}
+	if((%source.isZombie || %source.isBoss) && !%source.isPlayerZombie) {
+		//Stop here.
+		return;
+	}
 	if(!isObject(%source) || %source $= "") {
 		%SDB = "";
 		%sourceObject = 0;
diff --git a/scripts/TWM2/Systems/SuccessiveKills.cs b/scripts/TWM2/Systems/SuccessiveKills.cs
index 3ca0f0d..9382c38 100644
--- a/scripts/TWM2/Systems/SuccessiveKills.cs
+++ b/scripts/TWM2/Systems/SuccessiveKills.cs
@@ -4,6 +4,9 @@
 //Handles the successive and specific weapon kill listing
 
 function PerformSuccessiveKills(%player, %damageType) {
+   if(!isObject(%player) || !%player.isAlive()) {
+      return;
+   }	
    cancel(%player.successiveReset);
    %currentKills = %player.killsinarow2;
    %currentDTKills = %player.kills[%damageType];
@@ -47,6 +50,9 @@ function DoStreakPrint(%player, %kills, %damageType) {
 }
 
 function DoSuccessivePrint(%player) {
+   if(!isObject(%player) || !%player.isAlive()) {
+      return;
+   }	
    %client = %player.client;
    messageClient(%client, 'msgSoundFX', "~wfx/misc/MA1.wav");
    recordAction(%client, "SKC", %player.successive@"\t1");
diff --git a/scripts/TWM2/Zombie/ZombieCore.cs b/scripts/TWM2/Zombie/ZombieCore.cs
index ea60d8f..be316c2 100644
--- a/scripts/TWM2/Zombie/ZombieCore.cs
+++ b/scripts/TWM2/Zombie/ZombieCore.cs
@@ -49,7 +49,7 @@ $Zombie::TypeSpeed[11] = 1200;
 $Zombie::BaseJumpCooldown = 1500;
 
 //$Zombie::SpeedMultiplier[#]: An additional multiplier to be applied to the zombie's base speed when calculating the impulse, used to fine tune speed values
-$Zombie::SpeedMultiplier[2] = 0.6;
+$Zombie::SpeedMultiplier[2] = 0.95;
 $Zombie::SpeedMultiplier[3] = 0.8;
 $Zombie::SpeedMultiplier[4] = 0.75;
 
diff --git a/scripts/TWM2/Zombie/ZombieTypes/Ravager.cs b/scripts/TWM2/Zombie/ZombieTypes/Ravager.cs
index f5e3dcb..2497e1b 100644
--- a/scripts/TWM2/Zombie/ZombieTypes/Ravager.cs
+++ b/scripts/TWM2/Zombie/ZombieTypes/Ravager.cs
@@ -59,15 +59,32 @@ function RavagerZombieArmor::AI(%datablock, %zombie) {
 	if(!isObject(%zombie) || %zombie.getState() $= "dead") {
 		return;
 	}
-	if(isSet(%zombie.targetedPlayer)) {
+	if(%zombie.targetedPlayer !$= "") {
 		if(!isObject(%zombie.targetedPlayer) || %zombie.targetedPlayer.getState() $= "dead") {
 			%zombie.ambushing = 0;
 			%zombie.fullAttack = 0;
 			%zombie.ambushPosition = 0;
-			%zombie.targetedPlayer = 0;
+			%zombie.targetedPlayer = "";
 			%zombie.hasTarget = 0;
 		}
 	}	
+	else {
+		%targetParams = TWM2Lib_Zombie_Core("lookForTarget", %zombie);
+		%target = getWord(%targetParams, 0);
+		%distance = getWord(%targetParams, 1);
+		if(isObject(%target.player)) {
+			if(%distance <= $zombie::detectDist) {
+				%zombie.hasTarget = 1;
+				%zombie.targetedPlayer = %target.player;
+			}
+		}
+		else {
+			//No target, random movement.
+			%zombie.zombieRmove = schedule(500, %zombie, "TWM2Lib_Zombie_Core", "zRandomMoveLoop", %zombie);
+			%zombie.setActionThread("ski", true);		
+		}
+	}
+	//
 	if(%zombie.ambushing) {
 		//We're currently in an ambush maneuver, continue moving to position
 		if(vectorDist(%zombie.getPosition(), %zombie.ambushPosition) < 10) {
@@ -78,31 +95,37 @@ function RavagerZombieArmor::AI(%datablock, %zombie) {
 		}
 		else {
 			//If the target is near us, break off the ambush and go in for the kill...
-			%distanceToTarget = vectorDist(%zombie.getPosition(), %zombie.targetedPlayer.getPosition());
-			if(%distanceToTarget < 20) {
+			if(!isObject(%zombie.targetedPlayer)) {
+				//Target is dead... Look for a new one.
+				%zombie.targetedPlayer = "";
+				%zombie.hasTarget = 0;
 				%zombie.ambushing = 0;
-				%zombie.fullAttack = 1;
-				%zombie.ambushPosition = 0;
+				%zombie.fullAttack = 0;
+				%zombie.ambushPosition = 0;				
+			}
+			else {
+				%distanceToTarget = vectorDist(%zombie.getPosition(), %zombie.targetedPlayer.getPosition());
+				if(%distanceToTarget < 20) {
+					%zombie.ambushing = 0;
+					%zombie.fullAttack = 1;
+					%zombie.ambushPosition = 0;
+				}
+				//Otherwise, keep moving...
+				%datablock.move(%zombie);
 			}
-			//Otherwise, keep moving...
-			%datablock.move(%zombie);
 		}
 	}
 	else {
-		if(!%zombie.hasTarget) {
-			%targetParams = TWM2Lib_Zombie_Core("lookForTarget", %zombie);
-			%target = getWord(targetParams, 0);
-			%distance = getWord(%targetParams, 1);
-			if(isObject(%target.player)) {
-				if(%distance <= $zombie::detectDist) {
-					%zombie.hasTarget = 1;
-					%zombie.targetedPlayer = %target.player;
-				}
-			}
-			//Outside targeting range, ignore...
-		}
-		if(%zombie.hasTarget) {
-			//Ambush logic, determine if the best plan of action is a ambush, or a direct approach
+		//Ambush logic, determine if the best plan of action is a ambush, or a direct approach
+		if(!isObject(%zombie.targetedPlayer)) {
+			//Target is dead... Look for a new one.
+			%zombie.targetedPlayer = "";
+			%zombie.hasTarget = 0;
+			%zombie.ambushing = 0;
+			%zombie.fullAttack = 0;
+			%zombie.ambushPosition = 0;				
+		}	
+		else {
 			%distanceToTarget = vectorDist(%zombie.getPosition(), %zombie.targetedPlayer.getPosition());
 			if(%distanceToTarget > 50 && getRandom(1,10) == 1 && !%zombie.ambushing && !%zombie.fullAttack) {
 				//Ambush: Move to a side position from the target, then strike.
@@ -118,11 +141,6 @@ function RavagerZombieArmor::AI(%datablock, %zombie) {
 				%datablock.move(%zombie);
 			}
 		}
-		else {
-			//No target, random movement.
-			%zombie.zombieRmove = schedule(500, %zombie, "TWM2Lib_Zombie_Core", "zRandomMoveLoop", %zombie);
-			%zombie.setActionThread("ski", true);
-		}
 	}
 	%datablock.schedule(500, "AI", %zombie);
 }
diff --git a/scripts/player.cs b/scripts/player.cs
index a3e4b06..3bd9ee3 100644
--- a/scripts/player.cs
+++ b/scripts/player.cs
@@ -2805,7 +2805,7 @@ function Armor::onCollision(%this, %obj, %col, %forceVehicleNode) {
 			%obj.onfire = 1;
 			schedule(10, %obj, "burnloop", %obj);
 		}
-		if(%col.getState() $= "Dead" && (!%obj.isZombie && !%col.isZombie)) {
+		if(%col.getState() $= "Dead" && (!%obj.isZombie && !%obj.isBoss)) {
 			%obj.lasttouchedcorpse = %col;
 			%gotSomething = false;
 			// it's corpse-looting time!