Version: (using KDE 4.1.2)
Installed from: Unlisted Binary Package
Using xorg-server 1.5 with ati drivers 6.9 on an ati radeon 9200 card, kwin composite with opengl doesn't paint the desktop properly.
Here is an screenshot http://srkaj.com/photo/8/viu1223762102r.png
Here is the kwin output http://pastie.org/290248
And here is xorg.conf http://pastie.org/290250
And you haven't, by chance, explicitly switched the drawing method to shared memory in advanced compositing settings?
Can anyone else reproduce?
Two month old question not answered -> resolve remind.