Double contacts - how do I delete all? ...

I have been syncing successfully and exclusively through MobileMe but checked the sync all contacts setting under Sync Address Book Contacts in iTunes, and now I have two lists of the exact same contacts on my iPhone: 1) From My Mac and 2) MobileMe.

How do I delete all the ones From My Mac??

When I uncheck sync all contacts in iTunes, none of them are deleted - it retains all of them on my iPhone and just relists them as "On My iPhone."

I have also tried creating a blank group in Address Book and syncing only that one, which does delete out all the contacts that were syncing directly with Address Book via iTunes, but still leaves an empty group on my iPhone, listed again under "From My Mac." Again unchecking the sync all contacts in iTunes still leaves the empty group on my iPhone but lists it under "On My iPhone."

Any help appreciated - I have over 1300 contacts.

Best,
John

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