Is that ever mentioned?

Shall I go all the way back to the first book?

The goo wouldn’t last long—within a few more minutes, it would simply dissipate, vanish into thin air, return to wherever it had come from in the first place.
--Storm Front, ch. 23

If it didn't, every summoning would add a little more mass to the universe...

Suppose that you take a strong container -- a bell jar, for example -- and fill it with ectoplasm. Then you seal the container and allow the ectoplasm to dissipate. Since ectoplasm evaporates into "nothing", would you end up with a perfect vacuum?

I know this has been discussed before, so I'm hoping for quick answer.

If someone is in the middle of casting a thaumaturgy spell, and you throw a mundane object through the space above their magic cirle, does that break the circle? (Assume in this case that the circle is not being used to contain anything other than magical energy.)

From the terminology this is a bit weird. You don't usually compel one person through someone else's aspects, because someone's aspects are their way of showing you where they want difficulty. However I would totally allow the "Inhumanly Alert" Pixies to invoke their aspect for effect, which would lead to difficulties (though not necessarily immediate consequences) for the players. From a mechanical standpoint it's the same thing though, Pixies spend a fate point, players get a fate point, players' lives are complicated.

Well, the pixies have to get the point from somewhere first. However, if they do have one for whatever reason and they invoke their aspect, does the fate point go back into the bank or does it go to the player they're using it against?

With that much power in one place, I don't think any sane faction would try to start something directly, even rednecks. They wouldn't get two shots off before they ate thirty-one different flavors of "blam".

However, with that much power gathered in one place, having one group pull something and try to pin it on another would work just fine. Especially if subfaction A1 makes it look like faction B is trying to frame faction C for killing a member of subfaction A2. Or maybe B makes it look like A1 is trying to frame C for killing A2. Plotception! (For extra fun, in the second scenario, the White Council is B.)

Depending on the PCs' position, they can either act as the investigators who "manage" to pierce the first layer of deception, "uncovering" the false solution that the real perpetrators want them to find, or (more Dresden Files-y) they can realize that the official investigation came to the wrong conclusion because they're constrained by politics which the PCs, as free (well, free-er) agents, can dig past to the truth.

I know RAW says Toughness powers must apply to a catch, but then you've got Werewolves without one all over the place.  Alpha style werewolves don't have a catch like Silver, so why would other were-creatures?

Er... where? None of the Alphas have Toughness abilities, so naturally there's no Catch. The only one I see like that is the generic lycanthrope, which is probably an oversight. Consider it some kind of rare, zero-value catch because they only get it during the full moon.

Thanks! I figured someone would have asked this before. Sounds like it's all pretty much "use your common sense", I just wanted to make sure.

Edge, I was actually wondering whether each milestone should allow one skill swap in EACH list, or one skill swap on EITHER list. The latter seemed a bit harsh to me since a werewolf has twice as many skills to deal with, but I didn't know if there was a previous ruling on the matter.