Has the MBP EFI 1.5 update broken audio?

I just updated my MBP to the new EFI 1.5 update: my audio is now breaking up when playing any virtual instruments whether live or recorded (playback is constantly interrupted by 60 to 300 ms silent gaps) and CPU use in both Mainstage and Logic 8 is showing extreme peaking, when in fact the system monitor is barely registering 30% CPU use. In Logic, I'm getting "Error synchronizing audio and MIDI" as well, with like 1 track!
Is anyone else experiencing this? AFAIK, the only change has been the updated firmware. Oh, and the "Pro App" update that happened at the same time.
TIA
Message was edited by: Qzxptl

I tried the suggestion in this thread:
http://discussions.apple.com/thread.jspa?threadID=1463824&tstart=0
But it didn't make a difference. Software Update then offered the update to 2008-001, which was the original driver on my system.
So this appears not to be the issue. I'm stumped.
BTW: how DO you contact Apple support? I've got 3 years of Apple Care but I can't find a direct email contact for assistance? Nice.

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Has the MBP EFI 1.5 update broken audio?

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