I was doing some clean up on my machine, and I found a note to
myself written in 2004 on a bug in X that I see is still there.
I no longer have the info or remember what triggered this, so
rather than doing a sendpr I am posting here.
In file xsrc/xfree/xc/programs/Xserver/hw/xfree86/common/xf86fbman.c
line 1236 has bug, was
if (FullBox->y2 < FullBox->y1) return FALSE;
should be
if (FullBox->x2 < FullBox->x1) return FALSE;

	Cliff Wright