I'm running Mail under Mountain Lion, and am finding that the "previous recipients" list is not updating. This is annoying as it means that the autocomplete function for writing emails is also not functioning.

I've tried various fixes suggested elsewhere such as deleting the MailRecents-v4.abcdmr file from Application Support / Address Book, and repairing permissions, but neither of these work.

This problem started happening when I upgraded from Snow Leopard.

Any advice much appreciated.