Hi, if i dock the clipboard window on the right of my screen, when I switch spaces (swipe or [cmd]+[arrow]) to the right I see a ghost of the clipboard window during the animation, it disappears once the animation completes. I think this can make the spaces transition animation at bit stuttery sometimes:
I've seen this too, but I only ever see one or two pixels peeking out.
Yes, if I am docked on the right, when I move rightwards I see the ghost, and when I then move back leftward I see a couple of pixels sticking out exactly as you described. The ghost is playing peek-a-boo!!!
I removed the docking and still see stuttering, so suspect my performance issue is not related to the ghost forcing excessive compositing during the animation...
Make a docking window's alpha level 0 when it disappears. Fixes #1064