OFMG! That's what I saw today!
well it's compiled image, but that's what you[I] see when you move your mouse while in Expose/F10. (only you see one blue element at a time)
And if I click on one of this "ghosts", it's window opens for me in Default Workspace (along with default empty window with one empty tab - which you see)
So:
anybody had anything similar?
anybody reading it?
anybody having nothing of this sort?
P.S. I only saw it by chance - because if you don't move your mouse into these areas - it's absolutely transparent.