xfwm4 window shadow "glitch"

[Johan Forsberg]

Hi,

I've been trying out the compositor in xfwm4 and it's very nice, but I
do see some graphical "glitches". Particularly, every time a window
overlaps another and the overlapped window is brought to the front,
the shadow from the (previously) overlapping window is still visible
on the frontmost window. Moving or somehow redrawing this window
removes the shadow.

I'm on a nvidia card, and using a svn build of xfwm4 from a few days ago.

Cheers!

/Johan