I'm on Ubuntu/edgy with current compiz from compiz-repos (as stated on
go-ubuntu.com) using the free ati-driver.
I'm using MergedFB non-rectangular mode. (800x600+1024x768)
When activating GL-Desktop all windows maximize
on the full desktop (e.g. 1824x768) and not on the active screen which would be
the prefered behavior.
Without GL-Desktop everything works fine.
screenshot here: http://www.juvanus.de/files/mycompiz.html
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
This has been fixed ages ago... A little late response.