Comment 6 for bug 67919

Gnome-session doesn't handle overlapping viewports well. It just creates a overlay window for every screen whether they overlap or not.

The different shades of transparency seen in lock.jpg should be less prominent with the latest patch on feisty and as all this fading is quite an ugly hack it should be acceptable. However having an overlay window overlap the gksu input window or the window for unlocking the screen is a bigger problem.