I have been getting this from time to time, since my iPhone 4S, this all with the fact I can not access my Calendar, Contacts, and Email since moving to iCloud, but my 2010 Mini has SL so this all is totally frustrating.
I can not believe that I have to update to Lion, just to get everything to work and sync with my iCloud service, they should have made this backward compatible, not that I will not go to Lion 100%, but I was not expecting to have to do that now, not to mention my iCloud Services are going in and out, and I have lost contacts and calendar appointments with the migration.