I'm having the same problem myself, and it started at the same time.
The screen looks like this
http://img215.imageshack.us/img215/2434/wowheadproblem.jpg I've copied the errors I'm getting below. If anyone can help me fix this then it would be much appreciated.
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; GTB6.6; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; AskTB5.6; Creative AutoUpdate v1.40.01)
Timestamp: Mon, 1 Nov 2010 13:17:20 UTC
Message: Expected identifier, string or number
Line: 1
Char: 113794
Code: 0
URI: http://static.wowhead.com/js/locale_enus.js?1069
Message: 'LANG' is undefined
Line: 1
Char: 9078
Code: 0
URI: http://static.wowhead.com/js/global.js?1069
Message: 'PageTemplate' is null or not an object
Line: 82
Char: 1
Code: 0
URI: http://www.wowhead.com/npc=19719
Message: 'PageTemplate' is null or not an object
Line: 97
Char: 1
Code: 0
URI: http://www.wowhead.com/npc=19719
Message: 'Markup' is null or not an object
Line: 111
Char: 1
Code: 0
URI: http://www.wowhead.com/npc=19719
Message: 'Mapper.zoneDefaultLevel' is null or not an object
Line: 1
Char: 175440
Code: 0
URI: http://static.wowhead.com/js/global.js?1069
Message: 'Tabs.onLoad' is null or not an object
Line: 1
Char: 313926
Code: 0
URI: http://static.wowhead.com/js/global.js?1069
Message: 'Tabs.onLoad' is null or not an object
Line: 1
Char: 313926
Code: 0
URI: http://static.wowhead.com/js/global.js?1069
Message: 'PageTemplate' is null or not an object
Line: 1
Char: 1579
Code: 0
URI: http://static.wowhead.com/js/global.js?1069