I was a subscribed MobileMe user and transferred to iCloud a couple of weeks ago. I have five aliases as with MobileMe before.
A couple of days when I tried to uncheck "send and receive email from this alias", I got a persistent error message as attached below. Basically I can not disable this alias for whatever reason. Today I tried it again and still got the same error message. Obviously that error did not happen for a freshly created iCloud account with 3 aliases.
I am wondering if any old MobileMe users have the same situation.

A couple of days when I tried to uncheck "send and receive email from this alias", I got a persistent error message as attached below. Basically I can not disable this alias for whatever reason. Today I tried it again and still got the same error message. Obviously that error did not happen for a freshly created iCloud account with 3 aliases.
I am wondering if any old MobileMe users have the same situation.
