i had a problem with the game freezing and crashing (error 30002- don´t know if this is the same problem you are having...). My LS suggested going to config. and setting UPnP Port Mapping to "Do not use" as well as manually finding and deleating any files left over from the beta client. I did these two things and the game ran fine for months.

currently my game crashes again and i have been told by a moderator they are looking into the issue.

but, hey, maybe the above steps can help you? good luck