Anyone else seeing this one lots?
ERROR #132 (0x85100084) Fatal Exception
Program: C:\Program Files (x86)\World of Warcraft Beta\WoW.exe
Exception: 0x80000001 (GUARD_PAGE) at 0023:041A387E
Unfortunately, I've seen these kind (and this) errors more then I could count.
If it happens to often (making it un playable), clearing the (data/)cache directory sometimes helps.
Other times, I just quit the beta for a while, and it automagically disappeared.
There have been times that I suspected the game server side to caused it, since it disappeared after Blizzard rebooted the realms out of schedule and unannounced.