Comment 24 for bug 299330

This bug affects me as well for a couple of years now. What I see sometimes happening, is that the switcher is drawn in first instance with a windows title bar (without text). The "title" bar quickly disappears, and the switcher then extends downwards by the height of the title bar.

What helps to return to a correct behavior for a short while is to disable visual effects, then re-enable them using "System - Preferences - Appearance". tabbing remains quite slow, but not unworkable so. This concerns a Dell Latitude 810 with a [Radeon Mobility X600] graphics card.