Version: (using KDE 4.4.1) OS: Linux Installed from: Debian testing/unstable Packages On configuring around with Plasma activities to fix up the messup Plasma did to me setup (see bug #232215) I had it several times that I saw overlapping entries in the window task bar. I attach a screenshot.
Created attachment 42274 [details] example of such overlapping entries in window taskbar
This is being tracked at bug 224447. Regards *** This bug has been marked as a duplicate of bug 224447 ***