Here are some usuefull Sites in case you have problems with WoW:
After a patch: http://www.blizzard.com/support/wow/?id=aww01810p
http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=100540&p=1&tmp=1#post100540
http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=231024&p=1&tmp=1#post231024
http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=259683&p=1&tmp=1#post259683
Installation Problems: http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=58608&p=1&tmp=1#post58608
Chat channel issues: http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=264840&p=1&tmp=1#post264840
For Kari (Fixing the game without re-installing): http://forums-en.wow-europe.com/thread.aspx?fn=wow-tech-support-en&t=259683&p=1&tmp=1#post259683
Good luck
Felicitas
