I don't think it's necessarily (or at least specifically) a Revenant's Toll issue. A friend of mine is having this problem and has had it occur under two circumstances - almost immediately upon entering the new Rhalgr's Reach zone on foot, but also (after switching to the DX9 client and successfully escaping) again later upon returning to that same zone via the aetheryte crystal and running around in the zone for about 30 seconds. She's now stuck in that zone because of this, as she continues to immediately crash every time she tries to load back in.
She had absolutely no problems in Mor Dhona when we visited it earlier, however.
Also, we were adventuring together and I was with her every step of the way, and despite that have not run into the crash myself (/knock-on-wood). So it's difficult to say that it's a specific place, or caused by a corrupt item/outfit/mount etc, because if it had been something like that one would think we (and everyone else) would have both crashed (rather than just her only) whenever we were in the vicinity of a specific item or location. And that's just not happening (to everyone).
