I can confirm that compiz works ok dowgrading libxrand2 from 2:1.2.1-1 to the version in etch 2:1.1.0.2-5. Only libxrandr2 and xbaseclients were downgraded, all the remainding packages are in the testing versions. I have nor a nvidia card. This happens also with an i915 and aiglx. Regads, Diego