Another view of the new Fox 40 shows what appear to be bleed valves for excess pressure. But this view also reveals a new truss structure to the brake arch--not a huge surprise on the revised truss, as that was a key point shown at their 2013 product launch immediately prior to Sea Otter back in April
I'm willing to bet those bosses are for a fender or mud flap of some sort look on the back of the crown there is 2 little drilled silver holes in line with them. Custom fit carbon fender kinda like the v10's?
Look at those 2 little holes... Instead of applying a sticker to prevent stoking mud, I'm pretty sure they worked something like a plastic guard or something...
I think they're designed to bleed off the extra air pressure that gets generated after a run, when the air inside the main chamber heats up and expands. Marzocchi did the same thing years ago on the Shiver fork.