Since the patch I've been having sound isses when attacking from stealth. I've tried removing various addons (pitbull, bartender3, roguetimers) to no avail.
What happens is, I lose the combat sounds. I still get the background music and voiceovers ("Not Enough Energy", "You Can't Do That Yet"), but I don't get the weapon sounds or casting sounds. This actually makes the game much more difficult as I base a lot of my stuns/interrupts off of the sounds.
I've been having sound problems when I alt-tab out to check vent. It's sporadic at best, but it will / can cause in-game sound to be all garbled. To the point where I have to re-start the game to get it working correctly.
Not that my problems specifically relate to yours, but it's interesting to hear others are having sound related problems.
Yeah, I've never had any issues before, but i had to completely re-do my addons tuesday night. I now have pitbull instead of a few other frame mods. I also have a bug with attacking out of stealth where the target bar won't draw properly. It will draw, but its texture is a horribly distorted version of the stealth icon.
Anyway, the sound issue is both very annoying, very constant, and very inconsistent. My only guess is that it's related to the further locking down of creating frames when in combat.