Mail Crash on Autofill

Greetings,

Ok so anytime I use the autofill feature to fill in addresses in the To: field of an email Mail will immediately crash. I can work around this by using the Address Panel to insert names, but that defeats the purpose of autofill. I've removed all Previous Recipients and it still occurs. It happens whether I use a name from my own contact list or if it's pulling someone from the Global Address List.

Anyone else seen this?

The only major change that's occurred recently is I migrated from a C2Duo MBP to a new i7 MBP.

Thanks for any thoughts!