No sound on MacBook Pro after 10.6.8 upgrade

Question

Good morning.
I've got an 5,1 model MacBook Pro (aluminium unibody) 4gb RAM, 2.4GHz Core2Duo and it's been working fine up until yesterday when I installed the 10.6.8 Snow Leopard update.
Since then I get no sound through earphones or through the internal speakers.
If I ALT+Click the speaker icon I get two outputs:
Soundflower (2ch)
Soundflower (16ch)
I've no idea what Soundflower is, and a spotlight search just shows up sound.log which refers to
6/23 18:54:29.163  => WoW Version 4.1.0 (14007) Apr 29 2011
So that looks like World of Warcraft (just started WoW and logged in, turned sound off, turned sound on and no sound from WoW either)
Looking at the log in the console and narrowing it down to Soundflower I see:
6/25 10:50:02.974   --- [1] Soundflower (2ch)
6/25 10:50:02.976   --- [2] Soundflower (16ch)
6/25 10:50:02.980  ** Using Driver [0] System Default (Soundflower (2ch))
Anyway, I can get no sound in anything since 10.6.8!
Any ideas?

Answer 1

Okay, I tried EVERYTHING.
Trust Me.
I even did the downgrading to the 10.6.7 HDA.
HERE IS THE SOLUTION:
YOU WILL NOT NEED TO LOOK ANYWHERE ELSE, IF YOU FOLLOW THESE STEPS:
1. Download and install the 10.6.8 Supplemental Update from Apple (link below).
                            http://support.apple.com/kb/DL1429
2. Once the update is installed, and the system has restarted, type "Disk Utility" into Spotlight, press enter to launch it, and select your hard drive on the left. Then click "Repair Disk Permissions." (This step may or may not be necessary, but is a good idea in case there are discrepancies from the update).
3. Once the utility is finished, plug in some headphones. Then, press the Option key and click on the speaker icon in the menu bar.
4. Click the Headphones option under the "Output Device" section. You should get sound.
Unplug the headphones and ensure that the audio is not muted. You should now also get sound through your speakers.
THIS WILL WORK. DO NOT MESS WITH VOODOO, etc. I hear that will just cause kernel panics.
If you still have problems, try resetting the PRAM by simply shutting down the computer. Hold Command+Option+P+R before the gray screen appears. Hold it until you hear the tone a second time, then release.