diff -up -ru compiz-0.7.6.orig/src/screen.c compiz-0.7.6/src/screen.c
--- compiz-0.7.6.orig/src/screen.c	2008-06-03 00:31:45.000000000 +0200
+++ compiz-0.7.6/src/screen.c	2008-07-21 10:42:13.000000000 +0200
@@ -2419,6 +2419,11 @@ damageScreenRegion (CompScreen *screen,
 
     XUnionRegion (screen->damage, region, screen->damage);
 
+    if (screen->damage->numRects > 10) {
+	screen->damage->rects[0] = screen->damage->extents;
+	screen->damage->numRects = 1;
+    }	
+
     screen->damageMask |= COMP_SCREEN_DAMAGE_REGION_MASK;
 }