According to p 50, regulars can't shoot in woods, because of the cover. We had a situation last night where a regular unit were caught in the woods by cavalry charging them, and since they couldn't form square and falling back wasn't really an option, the player wanted to shoot at the oncoming enemy. We allowed it on the spot, since the charging cavalry were in base to base contact with the regular infantry (not that it did them much goo. Hah!), but we wanted an official opinion - can regulars in woods shoot if in base to base contact, where there aren't really many trees in between each unit, or is the "no shooting in woods" rule sacrosanct, and they can't do it under any circumstances?
(Note, we know that irregulars can shoot, we're only talking about regulars who are fully in the woods).