After window thumbnail from taskbar was shown, the frame of the thumbnail is seen until any other window gets activated. Reproducible: Always Steps to Reproduce: 1. Activate a thumbnail via taskbar 2. Deactivate it, but do not activate anoher window
Created attachment 76033 [details] image of the artifact The artifact is between two black frames
Assuming those are tooltips as well? *** This bug has been marked as a duplicate of bug 311502 ***