I got it this time, must have been a busy server at that time.
Anywho, tested in IE and got this error:
"Stack overflow at line:15"
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E)
Timestamp: Tue, 13 Jul 2010 04:12:37 UTC
Message: '_onLoad' is null or not an object
The above code is Generated HTML, but it can still help us track down the error.
It does seem to be something to do with connecting to Facebook.
If you have a facebook/twitter mod, I would suggest uninstalling it, for testing, if your members are happy, we can assume that's the problem and work on it.