#1 - April 19, 2012, 2:01 a.m.
Blizzard Post
If come across a bug during your Beta experience please post it in the Beta Bug Report Forum here:

Please do not post bugs in the other beta forums.

Issues with the game client itself should be posted in the Technical & Mac Technical Support Forums.
Technical Support: http://us.battle.net/wow/en/forum/4618535/
Mac Technical Support: http://us.battle.net/wow/en/forum/4618536/