diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index a7e7681333..93f435838f 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,8 @@
+March 18, 2008
+- Fixed the TArray serializer declaration.
+  (Thank you for your warnings, GCC! ;-)
+- Changed root sector marking so that it can happen incrementally.
+
 March 18, 2008 (Changes by Graf Zahl)
 - VC++ doesn't seem to like the TArray serializer so I added a workaround
   to be able to save the 3dMidtex attachment info.
diff --git a/src/dobjgc.cpp b/src/dobjgc.cpp
index 9a687b7e27..1bf3d483ce 100644
--- a/src/dobjgc.cpp
+++ b/src/dobjgc.cpp
@@ -89,6 +89,8 @@
 */
 #define DEFAULT_GCMUL		400 // GC runs 'quadruple the speed' of memory allocation
 
+// Number of sectors to mark for each step.
+#define SECTORSTEPSIZE	32
 
 #define GCSTEPSIZE		1024u
 #define GCSWEEPMAX		40
@@ -97,6 +99,19 @@
 
 // TYPES -------------------------------------------------------------------
 
+// This object is responsible for marking sectors during the propagate
+// stage. In case there are many, many sectors, it lets us break them
+// up instead of marking them all at once.
+class DSectorMarker : public DObject
+{
+	DECLARE_CLASS(DSectorMarker, DObject)
+public:
+	DSectorMarker() : SecNum(0) {}
+	size_t PropagateMark();
+	int SecNum;
+};
+IMPLEMENT_CLASS(DSectorMarker)
+
 // EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
 
 // PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
@@ -125,6 +140,8 @@ size_t Dept;
 
 // PRIVATE DATA DEFINITIONS ------------------------------------------------
 
+static DSectorMarker *SectorMarker;
+
 // CODE --------------------------------------------------------------------
 
 //==========================================================================
@@ -281,19 +298,15 @@ static void MarkRoot()
 		if (playeringame[i])
 			players[i].PropagateMark();
 	}
-	if (sectors != NULL)
+	if (SectorMarker == NULL)
 	{
-		for (i = 0; i < numsectors; ++i)
-		{
-			Mark(sectors[i].SoundTarget);
-			Mark(sectors[i].CeilingSkyBox);
-			Mark(sectors[i].FloorSkyBox);
-			Mark(sectors[i].SecActTarget);
-			Mark(sectors[i].floordata);
-			Mark(sectors[i].ceilingdata);
-			Mark(sectors[i].lightingdata);
-		}
+		SectorMarker = new DSectorMarker;
 	}
+	else
+	{
+		SectorMarker->SecNum = 0;
+	}
+	Mark(SectorMarker);
 	{ // Silly bots
 		DObject *foo = &bglobal;
 		Mark(foo);
@@ -564,6 +577,54 @@ void DelSoftRoot(DObject *obj)
 
 }
 
+//==========================================================================
+//
+// DSectorMarker :: PropagateMark
+//
+// Propagates marks across a few sectors and reinserts itself into the
+// gray list if it didn't do them all.
+//
+//==========================================================================
+
+size_t DSectorMarker::PropagateMark()
+{
+	int i;
+
+	if (sectors == NULL)
+	{
+		return 0;
+	}
+	for (i = 0; i < SECTORSTEPSIZE && SecNum + i < numsectors; ++i)
+	{
+		sector_t *sec = &sectors[SecNum + i];
+		GC::Mark(sec->SoundTarget);
+		GC::Mark(sec->CeilingSkyBox);
+		GC::Mark(sec->FloorSkyBox);
+		GC::Mark(sec->SecActTarget);
+		GC::Mark(sec->floordata);
+		GC::Mark(sec->ceilingdata);
+		GC::Mark(sec->lightingdata);
+	}
+	// If there are more sectors to mark, put ourself back into the gray
+	// list.
+	if (SecNum + i < numsectors)
+	{
+		SecNum += i;
+		Black2Gray();
+		GCNext = GC::Gray;
+		GC::Gray = this;
+	}
+	return i * sizeof(sector_t);
+}
+
+//==========================================================================
+//
+// STAT gc
+//
+// Provides information about the current garbage collector state.
+//
+//==========================================================================
+
 ADD_STAT(gc)
 {
 	static const char *StateStrings[] = {
diff --git a/src/farchive.h b/src/farchive.h
index 90d8c0fd0b..6d751d9e82 100644
--- a/src/farchive.h
+++ b/src/farchive.h
@@ -287,11 +287,9 @@ inline FArchive &operator<< (FArchive &arc, T* &object)
 
 FArchive &operator<< (FArchive &arc, const PClass * &info);
 
-template<class T>
-inline FArchive &operator<< (FArchive &arc, TArray<T> &self)
+template<class T,class TT>
+inline FArchive &operator<< (FArchive &arc, TArray<T,TT> &self)
 {
-	unsigned int i;
-
 	if (arc.IsStoring())
 	{
 		arc.WriteCount(self.Count);
@@ -301,7 +299,7 @@ inline FArchive &operator<< (FArchive &arc, TArray<T> &self)
 		DWORD numStored = arc.ReadCount();
 		self.Resize(numStored);
 	}
-	for (i = 0; i < self.Count; ++i)
+	for (unsigned int i = 0; i < self.Count; ++i)
 	{
 		arc << self.Array[i];
 	}
diff --git a/src/p_3dmidtex.cpp b/src/p_3dmidtex.cpp
index 3e48771cb1..d0c8944d87 100644
--- a/src/p_3dmidtex.cpp
+++ b/src/p_3dmidtex.cpp
@@ -305,4 +305,4 @@ bool P_LineOpening_3dMidtex(AActor *thing, const line_t *linedef, fixed_t &opent
 		return;
 	}
 	*/
-}
\ No newline at end of file
+}
diff --git a/src/p_3dmidtex.h b/src/p_3dmidtex.h
index f1faadaf58..215da2b3df 100644
--- a/src/p_3dmidtex.h
+++ b/src/p_3dmidtex.h
@@ -16,4 +16,4 @@ bool P_Check3dMidSwitch(AActor *actor, line_t *line, int side);
 bool P_LineOpening_3dMidtex(AActor *thing, const line_t *linedef, fixed_t &opentop, fixed_t &openbottom);
 
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/p_saveg.cpp b/src/p_saveg.cpp
index 8373702987..90a05a33b4 100644
--- a/src/p_saveg.cpp
+++ b/src/p_saveg.cpp
@@ -408,8 +408,6 @@ void P_SerializeWorld (FArchive &arc)
 	}
 }
 
-#if 0
-// VC++ produces a linker error when using the templated << operator
 void extsector_t::Serialize(FArchive &arc)
 {
 	arc << Midtex.Floor.AttachedLines 
@@ -418,39 +416,6 @@ void extsector_t::Serialize(FArchive &arc)
 		<< Midtex.Ceiling.AttachedSectors;
 }
 
-#else
-
-// Remove this when the problem above has been sorted out.
-template<class T>
-void SaveArray (FArchive &arc, TArray<T> &self)
-{
-	unsigned int i;
-
-	if (arc.IsStoring())
-	{
-		arc.WriteCount(self.Size());
-	}
-	else
-	{
-		DWORD numStored = arc.ReadCount();
-		self.Resize(numStored);
-	}
-	for (i = 0; i < self.Size(); ++i)
-	{
-		arc << self[i];
-	}
-}
-
-void extsector_t::Serialize(FArchive &arc)
-{
-	SaveArray(arc, Midtex.Floor.AttachedLines);
-	SaveArray(arc, Midtex.Floor.AttachedSectors);
-	SaveArray(arc, Midtex.Ceiling.AttachedLines);
-	SaveArray(arc, Midtex.Ceiling.AttachedSectors);
-}
-
-#endif
-
 //
 // Thinkers
 //
diff --git a/src/r_defs.h b/src/r_defs.h
index 09e8672d35..dd11745732 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -281,7 +281,6 @@ struct extsector_t
 		} Floor, Ceiling;
 	} Midtex;
 	
-	
 	void Serialize(FArchive &arc);
 };
 
diff --git a/src/tarray.h b/src/tarray.h
index ed31a28a15..b556c84197 100644
--- a/src/tarray.h
+++ b/src/tarray.h
@@ -49,7 +49,7 @@ class FArchive;
 template <class T, class TT=T>
 class TArray
 {
-	friend FArchive &operator<< (FArchive &arc, TArray<T> &self);
+	template<class U, class UU> friend FArchive &operator<< (FArchive &arc, TArray<U,UU> &self);
 
 public:
 	////////