Sound is messed up (on Mac at least)

[JGFMK1]

Latest fix on Wed 16th Nov 2011 has totally messed up gameplay...
Post Halloween quick fix did the damage today. RA went offline & problem started after 6pm GMT mod.
I use a Macbook Pro. All I get is static (white noise crackle).
I can't hear spells being cast any more or enemy creeping up on me.
Gameplay is also very laggy. Worst ever - some performance tweak gone awry?

Error log.txt says:

[16/11/2011 20:06:32] [SoundManager][sound_manager.cpp(562)] Sound buffer format not recognized.

By disabling sound completely in options screen prior to RA server selection, I got back the performance - but I am playing without one of my senses and this puts you at a real disadvantage in gameplay terms - so much so that I won't do PvP in war zone until it's fixed. There is a real irony to all this too - to paraphrase what the NGD guys said as the server restart countdown began. "Don't worry....It's a quick fix...." Whenever they say that in future I'll get nervous!