Comment 1 for bug 138987

Going through the bugs reported using this version there are no bugs that don't also affect the current version, or they are EXA related (which is not enabled by default) or other bizarre compiz-related bugs (slowness etc).

Instead, there is at least one long-standing bug which is confirmed being fixed with this release:

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/22985

surely there are others too, but asking people to test an unofficial driver outside the distribution is hard, plus it doesn't scale.