diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 00ca9b2ab1..1263b8c050 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,10 @@
+May 27, 2006 (Changes by Graf Zahl)
+- Fixed: FString::FormatHelper must not alter the null string.
+- Fixed: FString::FormatHelper should use ReallocBuffer instead of directly
+  calling Realloc. This caused crashes with the ACS print function.
+- Fixed: The dummy player spawned in G_FinishTravel must not start any ENTER
+  scripts.
+
 May 26, 2006
 - Changed makewad's zip routines so that it simply stores files that cannot be
   compressed smaller instead of using deflate anyway. Saves 133 bytes currently.
diff --git a/src/g_level.cpp b/src/g_level.cpp
index 0acaac1675..3c3c4d3a51 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -2004,7 +2004,11 @@ void G_FinishTravel ()
 		else
 		{
 			oldpawn = pawndup;
-			P_SpawnPlayer (&playerstarts[pawn->player - players]);
+
+			// The player being spawned here is a short lived dummy and
+			// must not start any ENTER script or big problems will happen.
+			P_SpawnPlayer (&playerstarts[pawn->player - players], false);
+
 			pawndup = pawn->player->mo;
 			if (!startkeepfacing)
 			{
diff --git a/src/p_local.h b/src/p_local.h
index fa4fe7b0b0..2118a5e762 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -90,7 +90,7 @@ void	P_UnPredictPlayer ();
 extern fixed_t FloatBobOffsets[64];
 extern AActor *MissileActor;
 
-void P_SpawnPlayer (mapthing2_t* mthing);
+void P_SpawnPlayer (mapthing2_t* mthing, bool startenterscripts = true);
 
 void P_ThrustMobj (AActor *mo, angle_t angle, fixed_t move);
 int P_FaceMobj (AActor *source, AActor *target, angle_t *delta);
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index b5350b95d9..b9b97e056c 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -3292,7 +3292,7 @@ void AActor::AdjustFloorClip ()
 EXTERN_CVAR (Bool, chasedemo)
 extern bool demonew;
 
-void P_SpawnPlayer (mapthing2_t *mthing)
+void P_SpawnPlayer (mapthing2_t *mthing, bool startenterscripts)
 {
 	int		  playernum;
 	player_t *p;
@@ -3428,7 +3428,12 @@ void P_SpawnPlayer (mapthing2_t *mthing)
 		p->cheats = CF_CHASECAM;
 
 	// setup gun psprite
-	P_SetupPsprites (p);
+	if (startenterscripts)
+	{
+		// This can also start a script so don't do it for
+		// the dummy player.
+		P_SetupPsprites (p);
+	}
 
 	// give all cards in death match mode
 	if (deathmatch)
@@ -3472,13 +3477,16 @@ void P_SpawnPlayer (mapthing2_t *mthing)
 	P_PlayerStartStomp (mobj);
 
 	// [BC] Do script stuff
-	if (state == PST_ENTER || (state == PST_LIVE && !savegamerestore))
+	if (startenterscripts)
 	{
-		FBehavior::StaticStartTypedScripts (SCRIPT_Enter, p->mo, true);
-	}
-	else if (state == PST_REBORN)
-	{
-		FBehavior::StaticStartTypedScripts (SCRIPT_Respawn, p->mo, true);
+		if (state == PST_ENTER || (state == PST_LIVE && !savegamerestore))
+		{
+			FBehavior::StaticStartTypedScripts (SCRIPT_Enter, p->mo, true);
+		}
+		else if (state == PST_REBORN)
+		{
+			FBehavior::StaticStartTypedScripts (SCRIPT_Respawn, p->mo, true);
+		}
 	}
 }
 
diff --git a/src/p_saveg.cpp b/src/p_saveg.cpp
index 8dd7d5f156..6c1c2fdb69 100644
--- a/src/p_saveg.cpp
+++ b/src/p_saveg.cpp
@@ -46,8 +46,6 @@
 #include "v_palette.h"
 #include "a_sharedglobal.h"
 
-extern void P_SpawnPlayer (mapthing2_t *mthing);
-
 static void CopyPlayer (player_t *dst, player_t *src, const char *name);
 static void ReadOnePlayer (FArchive &arc);
 static void ReadMultiplePlayers (FArchive &arc, int numPlayers, int numPlayersNow);
diff --git a/src/zstring.cpp b/src/zstring.cpp
index f05753c86a..829ded1cb7 100644
--- a/src/zstring.cpp
+++ b/src/zstring.cpp
@@ -218,9 +218,9 @@ int FString::FormatHelper (void *data, const char *cstr, int len)
 {
 	FString *str = (FString *)data;
 	size_t len1 = str->Len();
-	if (len1 + len > str->Data()->AllocLen)
+	if (len1 + len > str->Data()->AllocLen || str->Chars == &NullString.Nothing[0])
 	{
-		str->Chars = (char *)(str->Data()->Realloc((len1 + len + 127) & ~127) + 1);
+		str->ReallocBuffer((len1 + len + 127) & ~127);
 	}
 	StrCopy (str->Chars + len1, cstr, len);
 	str->Data()->Len = (unsigned int)(len1 + len);
diff --git a/tools/dehsupp/scanner.c b/tools/dehsupp/scanner.c
index c44b2df880..ce434068fb 100644
--- a/tools/dehsupp/scanner.c
+++ b/tools/dehsupp/scanner.c
@@ -1,4 +1,4 @@
-/* Generated by re2c 0.10.3 on Wed May 24 23:26:39 2006 */
+/* Generated by re2c 0.10.3 on Sat May 27 10:44:26 2006 */
 #line 1 "scanner.re"
 #include <string.h>
 #include <malloc.h>