The Catalyst 10.9 is out:
http://forums.guru3d.com/showthread.php?t=329014

And the votes are in:
vsync is broken in quake3. copying the atioglxx.dll from CAT 10.8 fixes it.
Second gpu does not work again FFS, can anyone confirm that 10.8b fixes it?
This is the same driver as 10.8/10.8a...

BC2 = Slow loading times.. i got 60 FPS LOWER.... 40FPS IN 32 PLAYER BATTLES WTF...

**** you ATI. your drivers are getting worse and worse...

Meh.. Back to 10.5a with 10.7 Profile.
I've downloaded the drivers and made a quick test, and all I can say is not a single bug was fixed, and the announced performance improvements are a lie.

Call of Prypiat benchmark results are exactly the same as 10.8, so 0% improvement.
Starcraft 2 performance is worse than 10.8. I've tested Devil's Playground level.
CAP 10.9=CAP 10.8A, no difference there either.
Unigine 2.1 has pop in or complete distant objects dissapearing. It begins at the town square with the dragon. Above options where used, nothing was overclocked. 10.8 ran just fine.
Installeld 10.9 and 10.9 profiles.

1. RUSE - Still hanging whole system as soon as intro starts.
2. BFBC2 - Still 50% slower than 10.5a
3. Open GL - Cant use Vsync.
I've just tried the Lost Planet 2 Benchmark, you know that one month old demo that crashes under DX11 with CrossFireX and guess what? Yup, it still crashes!
POP Forgotten Sands still have crossfire issues when the prince dies and performance drops to half. 4 months bug.
They even managed to drop the performance in crossfire in SC2, it runs even worse than 10.8.
Still no OpenCL v1.1 profile in the drivers (even though they had them in a hotfix/beta @ 10.7). Not terribly important but still!
The graphics issues with invisible textures, distorted graphics, etc. that were introduced with ATI 10.7 and Mount&Blade Warband v1.127 are still unsolved with this 10.9 driver.
Arma2 doesn't work for me with this driver. Keeps crashing. Back to 10.8b.
And this pretty much sums up what I have been saying here:

he Battlefield: Bad Company 2 -up of fixing, breaking, fixing then breaking it is a positive embarrassment, made worse by the fact that they admitted at one point that they weren't even aware of the issues!!! This has been an outstanding issue on the forums, including their own, since June!
Regression testing, they heard of it... NOT!