Don't feed the troll:
Originally Posted by FunkyRider
For many user the 2d acceleration is buggy. Especially firefox has often problems with parts of the window going black.
In the Archlinux Forums many have noticed it and the workaround is reverting to XAA.
Someone who uses debian and had the same problem posted this.
He has read it here in the phoronix forums:
Seems to be the same problem.
Strange thing is that d2d did work flawless when enabled with 10.5.
Tested with xorg 1.7, xorg 1.8 patched to identify as 1.7, kernel 2.6.33 and 2.6.34. All the same, compositing on and off. All the same.