Hey guys,
toadovsky and I have discussed this offline and it seems we are having the same problem. No MIDI signal at all, like it doesn't exist, when trying to use the Virus Control as a VST.
Ableton Live 8 picks up the Virus no worries, but the MIDI in is nowhere to be found.
If anyone is having the same issue and works it out, i'd love to hear what you did to get it going.
I too have recently upgraded the OS to 3.0.3 and also recently to Live 8.04. I'm not sure which of these two things have killed my MIDI-thru-virus, but from the OP's comments it sounds like OS3.0.3 is looking the guilty party.
Cheers