Binary package hint: compiz
Try this: Move a windows constantly at the side of the workspaces (so e.g. from workspace 1 on left to workspace 2 on right) and dont stop, move the window further. I't important to move the window while the "scrolling effect" of the desktop-wall is playing.
The window will in workspace 1, but "you" and your mouse (witch is still "grabbing" the window) will stay at the last workspace (mouse exits on the right, then comes back again in the left, on the same workspace).
Now you're still grabbing the window, but the distance between the mouse and the window is 1 or more workspaces...so you drop the window, and manually search for it in other workspaces, where could it be. If you have multiple workspaces, then this is what you wouldn't like to.
I'm using a daily updated Hardy, with nvdia-glx-new on an nVIDIA Geforce 7600GS, and a 1680x1050 TFT.
Confirmed using the "normal" settings of compiz on hardy/compiz 7.2:
You grab a windows and move a lot with it, throught the workspace. And sometimes, there is a distance of 1 workspace between your mouse and the windows.
But It won't bug using the cube desktop and rotate cube.