WoW crashing on character

When I enter some zones with Ioanpaveldve and rarely with Fakelmann (the characters on this account) my game crashes and gives me the error I linked below. Somehow this happens only on this account since I logged on others to see if I'll get the same error. Also on this account my achievements are also bugged and I can't open the menu or get the notification when I complete something. If this isn't the place to submit my bug I'm sorry and will move it elsewhere. The problem shouldn't be with the game itself because other accounts work and I just downloaded it again from your link.

http://i.imgur.com/MebRvMP.png

UPDATE: Started happening to characters in other accounts as well.
World of Warcraft Retail is Not Responding:
This is the error that i got.

Problem signature:
Problem Event Name: APPCRASH
Application Name: Wow.exe
Application Version: 5.4.2.17688
Application Timestamp: 5240eb59
Fault Module Name: StackHash_23d1
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7b96e
Exception Code: c0000374
Exception Offset: 000c37b7
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 23d1
Additional Information 2: 23d1326426a0c3af1f43abadf6458a75
Additional Information 3: e10b
Additional Information 4: e10b4d5b63bfadb8e9df015128b41601

Fix in this thread !!! http://forum.warmane.com/showthread....79-Error-codes