
Interesting. This is the first time I've seen the Mail icon change on the iCloud.com homepage. It has the universal notice or warning icon. Obviously, I'm signed in but cannot use any of the iCloud services.
I've done everything that one normally does to troubleshoot such issues: cleared cache, deleted all stored Safari website data, cleared history, closed and restarted Safari, even rebooted my iMac and iPhone after clearing and resetting all appropriate items. Also, I tried repairing disk permissions on my iMac as an outlier. Finally, I rebooted my DSL modem and Time Capsule just in case. But, as we are not having Internet connectivity or wireless issues, that was a long shot.
And yes, my system is up to date with the latest software updates. I always keep it updated. My next step is to schedule a call with Apple support as I've already gone through all the likely troubleshooting tips. Searching the Apple support website for Apple documents led me to this http://support.apple.com/kb/TS4002?viewlocale=en_US, but these are the steps I already know to do and they did not work.