I just came back from a gig with my Virus, no any kind of trouble with it. I am happy with that. Anyway what I've learned to do is take down volumy from both my Virus and also from Nord Stage which is midi-connected to Virus, when I leave the stage for break. As said earlier, Virus have even generated midi ghost notes to my Nord. I don't risk anymore those terrible ghost notes from big sound system when I am not there.
Btw I am not having metal to metal setup when I am on the stage. Virus is the upper keyboard, it's tilted but there are also big enough rubber contacts which touch Virus' bottom. On the other hand, those ghost notes happen not so often... This is a rare thing but very serious, at least for those of us who do gigs. Access should really try to find out what's going on. And this ghost notes issue isn't very new, I just read about someone complaining about same thing in post on 2011. All this been said, Virus did a great job again on the gig. It sounds SO amazing. Also, same day I used in the studio for commercial music. It's a tool which I use all the time.