I have also been unable to log in since this morning. In the blog there is a post saying that the issue has been resolved. At 19.00 CET, after the post was made, we are still unable to log in. Here is the error message on my browser:
"Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; 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: Mon, 22 Jul 2013 17:09:19 UTC
Message: Expected ')'
Line: 5
Char: 2414
Code: 0
URI: advancecommunication.crm4.dynamics.com/.../global.ashx
Message: Object expected
Line: 254
Char: 1
Code: 0