Hm....seriously, I can even force a crash by walking in certain places in altdorf. I do not crash in other games. I've got all the settings turned to the bare minimum, and no gm has gotten back to me yet.
A few of the places I crash every time:
walking out the curved doors of the flight master's building
walking between the bank and the ah near the wall
running in the lords area (whatever that narrow road there is called)
I also can fall through the auction house and end up in shadowlands if I take the right entrance into the building.