Another bug, at least in IE8:
PHP Code:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6.3; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 1.1.4322; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Sun, 17 Jan 2010 08:09:26 UTC
Message: 'YAHOO' is undefined
Line: 11
Char: 769
Code: 0
URI: http://mysite.com/clientscript/vbulletin-core.js?v=401
Message: 'vBulletin' is null or not an object
Line: 11
Char: 21419
Code: 0
URI: http://mysite.com/clientscript/vbulletin-core.js?v=401
I get this same error with IE8 if I use your demo link above.