Maybe I am not describing the problem right but it "feels" like the Virus hardware isn't receiving the music data (note on/off, control messges) fast enough.
Sometimes it is playing very slow and behind the rest of the music, but then speeds up in parts like it is trying to catch up. A lot of times after hitting stop in Live the virus will keep playing notes for several seconds even though everything else has stopped playing.
I'll post a couple of audio files and an example Live 5 set on my website in a bit that hopefully better demonstrates what I am hearing. I swear I am not making this up
EDIT:
I created a web page with sample audio files and the Live Set that I used to demonstrate the issues. I'd be curious if other mac/live users see the same issues or if it is just something about my setup that is causing it:
http://www.snarkydog.com/virus/
Some other things I have noticed:
* Using any midi control data during playback (like modulation or panning) seems to make the problem much worse.
* Problem seems to go away when I turn off VirusControl and just use Midi over USB to the virus. The same midi data plays back fine.
* Also I did try the same Live set on my work laptop (Windows XP) and that appears to play back fine.
I guess the simple solution would be to get a windows desktop for music, but not sure if I am ready for that kind of switch.