You can check it out here.
Wow. This is actually a really good FAQ. It covers most (if not all) of the major issues with the new IG codex. It looks like everything has been cleared up to work RAI - no using a mortar/Master of Ordnance to reduce scatter, Valks and Vendettas measure from base for embarking/contesting, no Grey Knight Terminators in a Valk/Vendetta, etc.
The only big thing that I saw was that it doesn't allow Master of the Fleet and Astropath bonuses to stack.
Anything else big in there that I missed?