I have noticed that compiz has issues with applications that minimize to the notification area. The prime example is gaim. I'll close the program with the X at the top right and then it'll be minimized to the notification area. When I click the icon again to bring it back, it won't display the buddy list. This bug is reproducable but not 100% so. Compiz version 0.0.13-0quinn34.
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
This most likely is fixed in the meantime. Please reopen if problem persists.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.