diff -ur ScummVM-cvs20040123/scummvm/scumm/gfx.cpp ScummVM-cvs20040123+hack/scummvm/scumm/gfx.cpp
--- ScummVM-cvs20040123/scummvm/scumm/gfx.cpp	2004-01-20 08:30:30.000000000 +0100
+++ ScummVM-cvs20040123+hack/scummvm/scumm/gfx.cpp	2004-01-25 11:23:58.000000000 +0100
@@ -245,6 +245,7 @@
 
 	if (slot != 3) {
 		vs->setDirtyRange(0, height);
+		updateDirtyScreen(slot);
 	}
 }