World of Warcraft®

Just throwing this out here incase people dont catch it from other sources. Seems the 64bit clients will stop you from updating.

http://us.battle.net/support/en/article/64bit-client-prevents-patching-to-433

Having our 64-bit test client installed will prevent you from patching to the upcoming 4.3.3 version of World of Warcraft. If you attempt to patch with the 64-bit files in your World of Warcraft folder, you will receive an error

In order to patch successfully, you must delete the following files from inside your World of Warcraft folder:

Wow-64.exe (PC)
MovieProxy.exe (PC)
Battle.net-64.dll (PC)
World of Warcraft-64.app (Mac)

I tried deleting them but it still comes up with the same thing

it came up for me that there was game files corruption, knowing that I had only deleted the 64bit beta files, I skipped it and it worked fine.. Make sure you are only deleteing those files.

new 64bit Beta Patch avalible on US forums,
http://us.battle.net/wow/en/forum/topic/3988300405

Works fine, as I have just logged in with it