Not sure who pissed in your Cheerios today. Is it not going to be the 7th rules set for RQ? At least in the same context as if you're counting MRQ and MRQ2 as "different"?
Well, since the GenCon announcement, I've actually lost count of the number of people who've pissed in my Cheerios. And in my Cornflakes. As to RQ's nomenclature, no it isn't RQ7. Is Chaosium's 'Cthulhu Dark Ages' 'Cthulhu 8'? If we'd made 'Classic Fantasy' a standalone game, would that be 'RQ X?'. How about RuneQuest Essentials? The answer is no. The same game engine that drives the generic rules will drive the Chaosium edition next year. In response to what to call it, I said Chaosium RuneQuest is just fine. I keep trying to politely reinforce this point, but people seem to willingly ignore it, twist it, leap to unfounded conclusions and assumptions (a bit like your 'and-likely-will-have-errata-and-substantial-clarifications-from-the-6.0-version' assumption) and yes, it pisses me (and others) off. I'm limited in what I can say, how I say it and where I say it. What I can do is make plain what the position is, and ask for some understanding and a little temperance on my own forums (and I did so several times in response to Vile's posts).
Vent over. And I do like the Dude (or Duderino) references.