Hi
Like some of you chaps I took a massive hit in performance with the new beta.
I tried going back to the old and hey presto FPS was back to where it had been previously.
Due to me being a bit OCD about getting the latest stuff working I decided to try something drastic, I completely wiped ClOD from my machine, uninstalled from Steam, deleted all and any folders to do with it. I then re-installed, once Steam had updated with the latest official patches I installed the new beta and hotfix. I also ensured that all the config files were correct as per Luthier's info.
I started the game up with no great expectations but was very pleasantly surprised to find it all working very very well. A very slight FPS hit from previous beta, but overall I would say the positives outweigh that
(bearing in mind it's still a beta)
To anyone that's having performance issues it's well worth a try.
My specs are
i5 750@ 3.3ghz, 8gb 1600 ram, EVGA GTX 570 @ 800mhz, (latest nvidia beta drivers) Win 7 64 bit.