4) In multiwindow, if two programs overlap, then Aero Peek will show
the correct shape for each window but the contents of one window
superimposed on the other in their stacking order.
Yes, I've seen the same behaviour with the TaskSwitchXP alt+tab
replacement.
This is a consequence of the way multiwindow mode is currently
implemented: everything is drawn onto a shadow framebuffer, and then
areas from that are drawn into native windows when they are exposed.
This means that we can only correctly draw the contents of the X window
at the top of the Z-order stack (as this may be occluding other X
windows). There are probably solutions to this.
Forgive me for being rather too terse, but I am not sure what those solutions
might be. I think those solutions involve using the rootless extension
(perhaps) or composite (definitely) to gain access to the bitmap for each
window independently.
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