1. Go to Settings
2. Go to Mail, Contacts, Calendars
3. Go to MobileMe
4. Turn off Contacts
5. Hit "Delete from my iPad"
6. Hit "Done"
7. Ensure that your contacts list is now completely empty
8. Go back to Settings
9. Go back to Mail, Contacts, Calendars
10. Go to MobileMe
11. Turn on Contacts
12. Hit "Done"
13. Review contacts and ensure that contacts have re-synced.