Index: win32ss/user/ntuser/winpos.c
===================================================================
--- win32ss/user/ntuser/winpos.c	(revision 67458)
+++ win32ss/user/ntuser/winpos.c	(working copy)
@@ -3218,7 +3218,7 @@
 {
    HRGN hrgnCopy = NULL;
    PWND Window;
-   INT flags = (SWP_NOCLIENTSIZE|SWP_NOCLIENTMOVE|SWP_NOACTIVATE|SWP_FRAMECHANGED|SWP_NOSIZE|SWP_NOMOVE);
+   INT flags = (SWP_NOCLIENTSIZE|SWP_NOCLIENTMOVE|SWP_NOACTIVATE|SWP_FRAMECHANGED|SWP_NOSIZE|SWP_NOMOVE|SWP_NOCOPYBITS);
    BOOLEAN Ret = FALSE;
    DECLARE_RETURN(INT);