Even though I have changed the description to 'iCloud' in the account type, after I save my changes, as soon as I close mail preferences the name reverts back to MobileMe in the listing of mailboxes in the left side of mail.
If I open preferences again and go to 'accounts', the description is back Mobile Me.
No matter how many times I've tried it will not take.
In system preferences everything is correct and all settings match my other computers (where in 'Mail' it says, going top to bottom, Inbox,Sent,Trash,Reminders and then iCloud OnMyMac etc. as opposed to Inbox,Sent,Trash,Reminders and then MobileMe OnMyMac etc.)
By the way, I am current on all updates and all systems are the same.
MacBook Pro (15-inch Late 2008), Mac OS X (10.7.2)