If it's not a CTD, it's "Awaiting Object Version Lists..." that the game gets hung up on in transit through portal or recall. The "Awaiting..." message will site there forever if I don't Alt-F4 to kill the game.

Pertinent PC specs are an Athlon64 3500+, 1GB RAM, GeFORCE 6800GT 256MB, Verizon DSL.