I indeed also have an Intel graphics chip (GMA 3100). I've found out
that the problem disappears when I change my color depth in xorg.conf to
24 bit.
Section Screen, DefaultDepth 24
I had changed it to 16 to speed up Compiz.
Hopefully this will help other people too!
--
No Window Borders when
I'm suffering from the same problem. After an update from 8.04 to 8.10
no window decorator works under compiz. I've noticed some updates about
compiz/window decoration today (November 7th), but this didn't solve the
problem.
--
No Window Borders when Desktop Effects Enabled
