I think I solved it. AdamK from forum.compiz-fusion.org suggested to add the line
Option "UseCompositeWrapper" "true" to the Device section of /etc/X11/xorg.conf. Haven't seen the problem occurring once since then. Original post: http://forum.compiz-fusion.org/showthread.php?t=8143 -- In Kubuntu Hardy, closed applications remain on the Taskbar https://bugs.launchpad.net/bugs/239645 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kdebase-workspace in ubuntu. -- kubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs