They can avoid conflicting with it all they want, but unless it's actually referenced, it remains S-canon, and even if part of it is referenced, that doesn't mean the rest happened.

I see that there's a formal distinction. I'm just curious what the practical distinction is, because I haven't noticed one so far.

I am not sure if it counts as "reference" (in fact i doubt it does), but the missions are referenced in the strategy guide in the form of stories so does that count?

Dear Chee:

Me and my friends Leo and Vess are having difficulties coming to an agreement on clone and droid numbers. Numerous sources (including the Revenge of the Sith novel) indicate 1.2-3 million active clones, but some other C canon novels point to billions, quadrillions, and those sorts of numbers. We saw your last response to the question of clone numbers, but since so many other sources showing higher numbers have come out, we're unsure if your response had become dated.

So, has the canon number of clones and droids gone higher or do they remain the same from your last response on the subject? And if it hasn't, should we consider that the conclusion until you or another official with the authority to do so says otherwise?

Also, what are the numbers regarding the Empire? Did their numbers suddenly jump up to trillions or did they slowly increase over time?

I'm a little confused about the idea of S-canon being "optional" - it seems like they still try pretty hard not to contradict stuff from a variety of sources that I've heard referred to as S-canon. In fact, I don't even feel like there are any more conflicts between new sources and S sources than between new sources and older C sources.

I cannot cite a post from Leland saying XWA has been overridden. But I can cite one where he says all video games created before the Holocron were initially designated S. I can cite one where he tells us the Holocron was started in 2000. And I can cite ones where he defines that S-canon means optional continuity. And I am not aware of XWA having been elevated to C-canon status since then. So, it should be correct if one puts the evidence together, but it is by no means explicit, and for all we know XWA has been elevated without outside knowledge of such (though given that it apparently was contradicted by RS2, that seems unlikely).

In Rogue Squadron 2 and X-Wing Alliance there are missions concerning the capture of the Corvette Razor which battle is canon?

Presumably Rogue Squadron 2. XWA was made before Holocron testing, making it initially S-canon, which means later (tested) sources, such as RS2, were free to override it as the creators saw fit.

In Rogue Squadron 2 and X-Wing Alliance there are missions concerning the capture of the Corvette Razor which battle is canon? The one where Ace defends the Razor or Rogue squadron?

Put more simply, I screwed up. Missed the reference. My fault.

In most Prequel era EU released prior to ATOC Jedi are depicted wielding a rainbow of lightsaber colors.

I think most of them were retconned. There is a retcon for why +post+-prequel Jedi have all kinds of colors, but to my knowledge there's no official statement on the whole topic. The only non-AOTC color that I'm aware of that was officially addressed was Mace Windu's lightsaber, the explanation being that he was borrowing someone else's blue lightsaber for a while.

I'm not sure if I've ever seen this addressed before.

In most Prequel era EU released prior to ATOC Jedi are depicted wielding a rainbow of lightsaber colors. For example Plo Koon is shown to have a a Yellow blade while A'Shared Hett wields two Crimson ones. Of course following ATOC all these Jedi were shown to have only Blue or Green blades. Have their pre-ATOC blades been retconned into being Blue or Green or did they all just switch to Blue or green. I think the latter would be rather silly but like I said I don't know if its ever been addressed.