When playing around with the |X|Y| functionality
BUG - Dragging the slider on a compare window beyond the container and releasing the mouse causes the window to follow your mouse around. Your drag and drop "sorting" functionality seems to kick in.
BUG 2 - Adding multiple versions to the compare frame works well, however it was initially hard to tell how to remove a given frame. Some ability from the frame would be nice, but that wasn't the bug. When you add multiple versions to compare you see them highlighted below. Then when you go to another view (i.e. the single revision view) and back to the |X|Y| compare view the frames you were last comparing are still there, however they are no longer highlighted.
Again, this looks great, just keep going! :)