Yes, it happens only at GR or Rift.. normal at bounties..
It never crashed at GR or Rift but always happened when I returned to town. Not exactly on return but after a while , dunno why though..
one more thing: I closed the program from the "X" at right top not to have any crash during town works and the game sound has gone..
So, I "alt+tab" + close program from tray and all ok..
sorry no error msg I have