diff --git a/src/servers/app/server/DisplayDriver.cpp b/src/servers/app/server/DisplayDriver.cpp
index 9abc260182..4e674ce518 100644
--- a/src/servers/app/server/DisplayDriver.cpp
+++ b/src/servers/app/server/DisplayDriver.cpp
@@ -204,6 +204,26 @@ void DisplayDriver::FillRect(BRect r, LayerData *d, int8 *pat)
 {
 }
 
+/*!
+	\brief Convenience function for server use
+	\param r BRegion to be filled
+	\param d Data structure containing any other data necessary for the call. Always non-NULL.
+	\param pat 8-byte array containing the pattern to use. Always non-NULL.
+
+*/
+void DisplayDriver::FillRegion(BRegion *r, LayerData *d, int8 *pat)
+{
+	if(!r || !d || !pat)
+		return;
+		
+	_locker->Lock();
+
+	for(int32 i=0; i<r->CountRects();i++)
+		FillRect(r->RectAt(i),d,pat);
+
+	_locker->Unlock();
+}
+
 /*!
 	\brief Called for all BView::FillRoundRect calls
 	\param r The rectangle itself
@@ -419,6 +439,26 @@ void DisplayDriver::StrokeRect(BRect r, LayerData *d, int8 *pat)
 {
 }
 
+/*!
+	\brief Convenience function for server use
+	\param r BRegion to be stroked
+	\param d Data structure containing any other data necessary for the call. Always non-NULL.
+	\param pat 8-byte array containing the pattern to use. Always non-NULL.
+
+*/
+void DisplayDriver::StrokeRegion(BRegion *r, LayerData *d, int8 *pat)
+{
+	if(!r || !d || !pat)
+		return;
+		
+	_locker->Lock();
+
+	for(int32 i=0; i<r->CountRects();i++)
+		StrokeRect(r->RectAt(i),d,pat);
+
+	_locker->Unlock();
+}
+
 /*!
 	\brief Called for all BView::StrokeRoundRect calls
 	\param r The rect itself
diff --git a/src/servers/app/server/DisplayDriver.h b/src/servers/app/server/DisplayDriver.h
index aea8ef982b..01e60978f3 100644
--- a/src/servers/app/server/DisplayDriver.h
+++ b/src/servers/app/server/DisplayDriver.h
@@ -36,6 +36,7 @@
 #include <Rect.h>
 #include <Locker.h>
 #include "RGBColor.h"
+#include <Region.h>
 
 class ServerCursor;
 class ServerBitmap;
@@ -106,6 +107,7 @@ public:
 	virtual void FillEllipse(BRect r, LayerData *d, int8 *pat);
 	virtual void FillPolygon(BPoint *ptlist, int32 numpts, BRect rect, LayerData *d, int8 *pat);
 	virtual void FillRect(BRect r, LayerData *d, int8 *pat);
+	virtual void FillRegion(BRegion *r, LayerData *d, int8 *pat);
 	virtual void FillRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat);
 //	virtual void FillShape(SShape *sh, LayerData *d, int8 *pat);
 	virtual void FillTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat);
@@ -124,6 +126,7 @@ public:
 	virtual void StrokeLine(BPoint start, BPoint end, LayerData *d, int8 *pat);
 	virtual void StrokePolygon(BPoint *ptlist, int32 numpts, BRect rect, LayerData *d, int8 *pat, bool is_closed=true);
 	virtual void StrokeRect(BRect r, LayerData *d, int8 *pat);
+	virtual void StrokeRegion(BRegion *r, LayerData *d, int8 *pat);
 	virtual void StrokeRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat);
 //	virtual void StrokeShape(SShape *sh, LayerData *d, int8 *pat);
 	virtual void StrokeTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat);
diff --git a/src/servers/app/server/Layer.cpp b/src/servers/app/server/Layer.cpp
index 7d8c359b67..b7f3355d66 100644
--- a/src/servers/app/server/Layer.cpp
+++ b/src/servers/app/server/Layer.cpp
@@ -36,6 +36,12 @@
 #include "RectUtils.h"
 
 //#define DEBUG_LAYER
+#define DEBUG_REGIONS
+
+#ifdef DEBUG_REGIONS
+#include "Desktop.h"
+#include "DisplayDriver.h"
+#endif
 
 //! TokenHandler object used to provide IDs for all Layers and, thus, BViews
 TokenHandler view_token_handler;
@@ -685,12 +691,20 @@ printf("Layer: %s: Move By (%.1f,%.1f)\n",_name->String(),x,y);
 
 	if(_parent)
 	{
-		if(_parent->_invalid==NULL)
-			_parent->_invalid=new BRegion(oldframe);
-		else
-			_parent->_invalid->Include(oldframe);
-	}
+		BRegion *i=new BRegion(oldframe);
+		if(TestRectIntersection(oldframe,_frame))
+			i->Exclude(_frame);
 
+		if(_parent->_invalid==NULL)
+			_parent->_invalid=i;
+		else
+		{
+			_parent->_invalid->Include(i);
+			delete i;
+		}
+		_parent->_is_dirty=true;
+	}
+	_is_dirty=true;
 //	for(Layer *lay=_topchild; lay!=NULL; lay=lay->_lowersibling)
 //		lay->MoveBy(x,y);
 //	Invalidate(Frame());
@@ -752,18 +766,16 @@ printf("Layer: %s: Rebuild Regions (%s)\n",_name->String(),include_children?"inc
 	{
 		if(childlay->_visible && childlay->_hidecount==0)
 		{
-			// reg is what is _visible in the layer's _parent's coordinate system
-//			reg=new BRegion(ConvertToParent(_visible));
-			// reg2 is the layer's _visible region in the sibling's coordinate system
-//			reg2=new BRegion(childlay->ConvertFromParent(reg));
-//			delete reg;
-
-			// lowersiblings occupy screen space _above_ a layer, so the layer itself
-			// must remove from its _visible region 
-//			_visible->Exclude(reg2);
-//			delete reg2;
-			reg=new BRegion(ConvertToParent(_visible));
+#ifdef DEBUG_REGIONS
+printf("old visible:");_visible->PrintToStream();
+#endif
+			reg=new BRegion(childlay->ConvertToParent(childlay->_visible));
 			_visible->Exclude(reg);
+#ifdef DEBUG_REGIONS
+printf("child visible:");childlay->_visible->PrintToStream();
+printf("converted child visible:");reg->PrintToStream();
+printf("new visible:");_visible->PrintToStream();
+#endif
 			delete reg;
 		}
 	}
diff --git a/src/servers/app/server/WinBorder.cpp b/src/servers/app/server/WinBorder.cpp
index 11676b4354..0b2f5894c2 100644
--- a/src/servers/app/server/WinBorder.cpp
+++ b/src/servers/app/server/WinBorder.cpp
@@ -296,11 +296,6 @@ printf("ClickMove: Drag\n");
 			_win->Unlock();
 			
 			lock_layers();
-//			_parent->Invalidate(oldmoveframe);
-//			MoveBy(dx,dy);
-//			_decorator->MoveBy(BPoint(dx, dy));
-//			_parent->RequestDraw();
-//			_decorator->Draw();
 			BRegion *reg=_decorator->GetFootprint();
 			_driver->CopyRegion(reg,_win->_frame.LeftTop());