Comment 6 for bug 464031

I've now seen this bug on Fedora 12 as well. It is not a problem unless desktop effects are enabled. Without desktop effects, running xwininfo and clicking on the title bard gives the same window id as it does if you click ont he clock face. With desktop effects enabled you get two different window ids.I'm attaching two screen shots, both taken using commands like
xwd -screen | convert - xxx.png
xclock-face.png is the image captured by clicking only in the face of hte clock. xclock-title.png is the additional image area that is captured if the click is done in the title bar.

Looks to me like the problem may be in compiz-fusion or similar component rather than in the underlying graphics driver.