This appears to be a somewhat recent experience: I have logged on to the https://manage.windowsazure.com last month and all was working fine. Today I went and logged on via the ASC/ADFS SSO, and got the management portal with the top menu working, but just a spinner image in the body of the page. The spinner is stuck there after several minutes (see the attached image). I am running IE10.0.9200.17183 on Windows Server 2012 Datacenter Edition x64 (Version 6.2, build 9200). The portal opens just fine if I use Google Chrome browser. In IE10 I tried playing with browser compatibility mode in developer tools - same result. I've also tried in-private browser session to make sure I can exclude stale cache. No joy.
I was wondering if this is a known issue, or perhaps an indication that Microsoft is shifting to using the new portal administration interface (it actually works in IE 10 no problem, I just don't like it as much). Thanks in advance.