diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index f42d1c18c1..a96587d970 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,13 @@
+March 23, 2008 (Changes by Graf Zahl)
+- Expanded the args for MAPINFO special actions to 32 bit integers as in
+  the rest of the game.
+- Fixed: The specialaction list was not copied properly when transferred
+  from the defaultinfo.
+- Fixed: The defaultinfo for MAPINFO wasn't cleared fully after MAPINFO
+  parsing was completed.
+- Made Doom-format linedef translators a map property so that it's easier
+  to define replacements or extensions.
+
 March 22, 2008
 - Changed MIDI playback to not bother playing super short songs that don't
   contain enough music to fill the initial output buffers.
diff --git a/src/g_level.cpp b/src/g_level.cpp
index 37e4f54de1..0cfaa3e0d4 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -309,6 +309,7 @@ static const char *MapInfoMapLevel[] =
 	"teamplayoff",
 	"checkswitchrange",
 	"nocheckswitchrange",
+	"translator",
 	NULL
 };
 
@@ -458,6 +459,7 @@ MapHandlers[] =
 	{ MITYPE_SCFLAGS,	LEVEL_FORCETEAMPLAYOFF, ~LEVEL_FORCETEAMPLAYON },
 	{ MITYPE_SETFLAG,	LEVEL_CHECKSWITCHRANGE, 0 },
 	{ MITYPE_CLRFLAG,	LEVEL_CHECKSWITCHRANGE, 0 },
+	{ MITYPE_STRING,	lioffset(translator), 0 },
 };
 
 static const char *MapInfoClusterLevel[] =
@@ -605,6 +607,20 @@ void G_ParseMapInfo ()
 	}
 }
 
+static FSpecialAction *CopySpecialActions(FSpecialAction *spec)
+{
+	FSpecialAction **pSpec = &spec;
+
+	while (*pSpec)
+	{
+		FSpecialAction *newspec = new FSpecialAction;
+		*newspec = **pSpec;
+		*pSpec = newspec;
+		pSpec = &newspec->Next;
+	}
+	return spec;
+}
+
 static void G_DoParseMapInfo (int lump)
 {
 	level_info_t defaultinfo;
@@ -624,8 +640,7 @@ static void G_DoParseMapInfo (int lump)
 		switch (sc.MustMatchString (MapInfoTopLevel))
 		{
 		case MITL_DEFAULTMAP:
-			if (defaultinfo.music != NULL) delete [] defaultinfo.music;
-			if (defaultinfo.intermusic != NULL) delete [] defaultinfo.intermusic;
+			ClearLevelInfoStrings(&defaultinfo);
 			SetLevelDefaults (&defaultinfo);
 			ParseMapInfoLower (sc, MapHandlers, MapInfoMapLevel, &defaultinfo, NULL, defaultinfo.flags);
 			break;
@@ -668,6 +683,11 @@ static void G_DoParseMapInfo (int lump)
 			{
 				levelinfo->intermusic = copystring (levelinfo->intermusic);
 			}
+			if (levelinfo->translator != NULL)
+			{
+				levelinfo->translator = copystring (levelinfo->translator);
+			}
+			levelinfo->specialactions = CopySpecialActions(levelinfo->specialactions);
 			if (HexenHack)
 			{
 				levelinfo->WallHorizLight = levelinfo->WallVertLight = 0;
@@ -773,14 +793,7 @@ static void G_DoParseMapInfo (int lump)
 
 		}
 	}
-	if (defaultinfo.music != NULL)
-	{
-		delete [] defaultinfo.music;
-	}
-	if (defaultinfo.intermusic != NULL)
-	{
-		delete [] defaultinfo.intermusic;
-	}
+	ClearLevelInfoStrings(&defaultinfo);
 }
 
 static void ClearLevelInfoStrings(level_info_t *linfo)
@@ -800,6 +813,11 @@ static void ClearLevelInfoStrings(level_info_t *linfo)
 		delete[] linfo->level_name;
 		linfo->level_name = NULL;
 	}
+	if (linfo->translator != NULL)
+	{
+		delete[] linfo->translator;
+		linfo->translator = NULL;
+	}
 	for (FSpecialAction *spac = linfo->specialactions; spac != NULL; )
 	{
 		FSpecialAction *next = spac->Next;
diff --git a/src/g_level.h b/src/g_level.h
index 69c3e0ac0d..8608ecdb74 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -124,7 +124,7 @@ struct FSpecialAction
 {
 	FName Type;					// this is initialized before the actors...
 	BYTE Action;
-	WORD Args[5];				// must allow 16 bit tags for 666 & 667!
+	int Args[5];				// must allow 16 bit tags for 666 & 667!
 	FSpecialAction *Next;
 };
 
@@ -163,6 +163,7 @@ struct level_info_s
 	int			airsupply;
 	DWORD		compatflags;
 	DWORD		compatmask;
+	char		*translator;	// for converting Doom-format linedef and sector types.
 
 	// Redirection: If any player is carrying the specified item, then
 	// you go to the RedirectMap instead of this one.
diff --git a/src/gi.cpp b/src/gi.cpp
index 7bca0ede96..72231f79ca 100644
--- a/src/gi.cpp
+++ b/src/gi.cpp
@@ -94,7 +94,8 @@ gameinfo_t HexenGameInfo =
 	GAME_Hexen,
 	150,
 	"F_SKY",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/heretic.txt",	// not really correct but this was used before.
 };
 
 gameinfo_t HexenDKGameInfo =
@@ -122,7 +123,8 @@ gameinfo_t HexenDKGameInfo =
 	GAME_Hexen,
 	150,
 	"F_SKY",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/heretic.txt",	// not really correct but this was used before.
 };
 
 gameinfo_t HereticGameInfo =
@@ -150,7 +152,8 @@ gameinfo_t HereticGameInfo =
 	GAME_Heretic,
 	150,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/heretic.txt",
 };
 
 gameinfo_t HereticSWGameInfo =
@@ -178,7 +181,8 @@ gameinfo_t HereticSWGameInfo =
 	GAME_Heretic,
 	150,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/heretic.txt",
 };
 
 gameinfo_t SharewareGameInfo =
@@ -206,7 +210,8 @@ gameinfo_t SharewareGameInfo =
 	GAME_Doom,
 	100,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/doom.txt",
 };
 
 gameinfo_t RegisteredGameInfo =
@@ -234,7 +239,8 @@ gameinfo_t RegisteredGameInfo =
 	GAME_Doom,
 	100,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/doom.txt",
 };
 
 gameinfo_t RetailGameInfo =
@@ -262,7 +268,8 @@ gameinfo_t RetailGameInfo =
 	GAME_Doom,
 	100,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/doom.txt",
 };
 
 gameinfo_t CommercialGameInfo =
@@ -290,7 +297,8 @@ gameinfo_t CommercialGameInfo =
 	GAME_Doom,
 	100,
 	"F_SKY1",
-	24*FRACUNIT
+	24*FRACUNIT,
+	"xlat/doom.txt",
 };
 
 gameinfo_t StrifeGameInfo =
@@ -318,7 +326,8 @@ gameinfo_t StrifeGameInfo =
 	GAME_Strife,
 	150,
 	"F_SKY001",
-	16*FRACUNIT
+	16*FRACUNIT,
+	"xlat/strife.txt",
 };
 
 gameinfo_t StrifeTeaserGameInfo =
@@ -346,7 +355,8 @@ gameinfo_t StrifeTeaserGameInfo =
 	GAME_Strife,
 	150,
 	"F_SKY001",
-	16*FRACUNIT
+	16*FRACUNIT,
+	"xlat/strife.txt",
 };
 
 gameinfo_t StrifeTeaser2GameInfo =
@@ -374,5 +384,6 @@ gameinfo_t StrifeTeaser2GameInfo =
 	GAME_Strife,
 	150,
 	"F_SKY001",
-	16*FRACUNIT
+	16*FRACUNIT,
+	"xlat/strife.txt",
 };
diff --git a/src/gi.h b/src/gi.h
index 49ab57be3f..101074641a 100644
--- a/src/gi.h
+++ b/src/gi.h
@@ -113,6 +113,7 @@ typedef struct
 	int defKickback;
 	char SkyFlatName[9];
 	fixed_t StepHeight;
+	const char *translator;
 } gameinfo_t;
 
 extern gameinfo_t gameinfo;
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index b0c1146dea..4268d9062a 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -63,6 +63,7 @@
 extern void P_SpawnMapThing (mapthing2_t *mthing, int position);
 extern bool P_LoadBuildMap (BYTE *mapdata, size_t len, mapthing2_t **things, int *numthings);
 
+extern void P_LoadTranslator(const char *lump);
 extern void P_TranslateLineDef (line_t *ld, maplinedef_t *mld);
 extern void P_TranslateTeleportThings (void);
 extern int	P_TranslateSectorSpecial (int);
@@ -3605,6 +3606,10 @@ void P_SetupLevel (char *lumpname, int position)
 			{
 				level.flags &= ~LEVEL_LAXMONSTERACTIVATION;
 			}
+
+			// We need translators only for Doom format maps.
+			// If none has been defined in a map use the game's default.
+			P_LoadTranslator(level.info->translator != NULL? (const char *)level.info->translator : gameinfo.translator);
 		}
 		FBehavior::StaticLoadDefaultModules ();
 
diff --git a/src/xlat/parse_xlat.cpp b/src/xlat/parse_xlat.cpp
index a15f248803..d414ccb419 100644
--- a/src/xlat/parse_xlat.cpp
+++ b/src/xlat/parse_xlat.cpp
@@ -44,6 +44,7 @@
 #include "xlat_parser.h"
 #include "xlat.h"
 
+static FString LastTranslator;
 TAutoGrowArray<FLineTrans> SimpleLineTranslations;
 FBoomTranslator Boomish[MAX_BOOMISH];
 int NumBoomish;
@@ -462,39 +463,26 @@ void ParseXlatLump(const char *lumpname, void *pParser, XlatParseContext *contex
 //
 //==========================================================================
 
-void ParseXlat(const char *lumpname)
+void P_LoadTranslator(const char *lumpname)
 {
-	void *pParser = XlatParseAlloc(malloc);
-
-	XlatParseContext context;
-
-	ParseXlatLump(lumpname, pParser, &context);
-	XlatToken tok;
-	tok.val=0;
-	XlatParse(pParser, 0, tok, &context);
-	XlatParseFree(pParser, free);
-}
-
-//==========================================================================
-//
-//
-//
-//==========================================================================
-
-AT_GAME_SET(Translators)
-{
-	if (gameinfo.gametype == GAME_Doom)
+	// Only read the lump if it differs from the previous one.
+	if (LastTranslator.CompareNoCase(lumpname))
 	{
-		ParseXlat("xlat/doom.txt");
-	}
-	else if (gameinfo.gametype == GAME_Strife)
-	{
-		ParseXlat("xlat/strife.txt");
-	}
-	else
-	{
-		ParseXlat("xlat/heretic.txt");
+		// Clear the old data before parsing the lump.
+		SimpleLineTranslations.Clear();
+		NumBoomish = 0;
+		SectorTranslations.Clear();
+		SectorMasks.Clear();
+
+		void *pParser = XlatParseAlloc(malloc);
+
+		XlatParseContext context;
+
+		ParseXlatLump(lumpname, pParser, &context);
+		XlatToken tok;
+		tok.val=0;
+		XlatParse(pParser, 0, tok, &context);
+		XlatParseFree(pParser, free);
+		LastTranslator = lumpname;
 	}
 }
-
-