This has probably been discussed to death before, but:
I was reading the Training Manual (Chapter K) and came across something interesting. I was reading along with VASL up, just because it is easier to switch boards and things like that than fooling around with the real thing. But I found something really interesting: on page K8, the Drill Sergeant asks if we can see FF5 from Z5. He's giving us a tip that sighting an LOS along hexspines are really easy to eyeball here. The answer the squad gives is "yes."
However, to me eyeballing it in VASL, it looks blocked, due to the woods in CC5 which barely touch the hexside. The VASL LOS thread also tells me it is blocked. So then I take a look at board 1. I don't have a SK-style board 1, but I do have 3 or 4 copies of the old board. And looking at those, it is a real tough call. I mean, yeah, it sort of looks like the woods come out to the hexside, but it isn't as obvious as on the VASL map. It sort of looks like an ink smudge or printer mistake. Especially when you compare the edge of these woods to those in hex DD8. I'm guessing that hex 1CC5 has been argued over before, in myriad games played. But when it comes down to it, the LOS from Z5 to FF5 does look clear to me.
(Also, I'm reading the second edition of the RB. Maybe this is an erratum. I kind of doubt it, though.)
But this brings up a larger question: how to deal with discrepancies between the boards on VASL and the boards as we have them otherwise? I once played a VASL game with a guy who kept checking the LOS on his boards at home. If the LOS looked really close on VASL, he'd pause and say, "hang on, let me check the actual board here, because sometimes VASL is off." Of course, I didn't have my boards handy at the time and couldn't verify what he reported. And besides that, it seemed fishy to me. They guy could have been sitting there checking LOSes all the time before declaring shots, without my knowing it! I think this kind of thing definitely constitutes cheating, but we can set it aside.
Honestly, I think that if I'm playing a game on VASL, then I'm using a VASL board, which may or may not be identical to the original board. I'm sure for the most part they are, but when discrepancies arise then we may as well stick to the board we are on. But is there any other consensus among players? Thus far I've only met one guy who checks his physical boards while playing the game, but I've hardly played that many people.