I confirm that the fix from ppa:vanvugt/compiz (it is still not present in the updates repository, and neither in backports) works under Oneiric with fglrx 8.881-0ubuntu4.1 using Ati Radeon HD Mobility 3470.
But it seems that it had also a side effect: slowing down (maybe by increasing the time value?) the animations when opening/closing a window. This isn't really a problem, since compiz animations can be safely turned off altogether.
I confirm that the fix from ppa:vanvugt/compiz (it is still not present in the updates repository, and neither in backports) works under Oneiric with fglrx 8.881-0ubuntu4.1 using Ati Radeon HD Mobility 3470.
But it seems that it had also a side effect: slowing down (maybe by increasing the time value?) the animations when opening/closing a window. This isn't really a problem, since compiz animations can be safely turned off altogether.