After upgrade from KDE 4.11.0 to 4.11.1, a single left-click on a task/button in the taskbar does nothing. Previously, this raised/maximized/minimized the window of the task. Double left-click still maximizes/minimizes the window. Reproducible: Always Steps to Reproduce: 1. Start a few applications 2. Click on a task in the taskbar whose window is obscured by another window Actual Results: Nothing happens. Expected Results: The window should be raised. Worked fine with the previous KDE 4.11.0.
You can disable "Show tooltips" until your distro backports the patch or upgrades to 4.11.2. *** This bug has been marked as a duplicate of bug 324470 ***
Thank you for the very quick help! Sorry for creating a duplicate bug. Cheers, Torsten