I'll throw my problem in this hat. Just installed and not working with GW2 in fullscreen (which defeats the purpose for me at the moment) Whenever I leave GW2, i get a crash message and sendto for arenanet. I grabbed the first few lines of the error, maybe it will help?
*--> Crash <--*
Memory at address 08cf2990 could not be written
When: 2013-01-08T00:20:31Z 2013-01-07T17:20:31-07:00
Uptime: 0 days 0:01:00