compiz - Jun 2008 - gtk-window-decorator does not show metacity theme correctly

Hello,
I have got a problem with gtk-window-decorator when it is configured
to display theme with metacity.
I cannot see the buttons of all metacity theme I used. I have an ATI
mobility radeon 9800 with opensource driver radeon on Ubuntu 8.04.
I installed both compiz x.7.4 e  x.7.6 version backported but the bug
does not disappear.
Here is the bug report in launchpad where you can fine more information:

https://bugs.edge.launchpad.net/ubuntu/+source/compiz/+bug/242504

Here is the bug report in opencompositing:

http://bugs.opencompositing.org/show_bug.cgi?id=981

Could someone tell me how can I do to debug gwd (gtk-window-decorator)
to improve or report more stuff for the detail of the bug.

Have a nice day,

--
Iacopo Masi
Key ID = 0xC8155272
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