Okay, so I've read Avengers vs. X-Men # 12, and in the end, there's a panel where Captain America tells Cyclops that his fellow X-Men are on the run and there's no sign of them.

This is the panel I'm talking about:

You can see that Emma Frost's "Wanted" poster is clearly visible.

But wasn't New Avengers #30 specifically about transporting Emma Frost to a secure location, when Daredevil, Thing, Luke Cage and Mockingbird were attacked by the Purifiers? As far as I remember, Emma Frost did not manage to escape during that issue. She tried, but she was stopped by Daredevil.

So is this an error in continuity? Or am I just missing something?

Okay, I've found the exact same topic on the Emma Frost boards (duh!)

Anyway:

http://www.comicvine.com/emma-frost/29-1457/where-is-she/92-699446/#18