Free Duplicate Remover for Outlook?

As you might have seen in a previous post i have "upgraded" to Vista. However, a new problem has happened with my PDA. It seems that all my Tasks have been duplicated. Has anyone seen a duplicate remover out there for Outlook that is free?

A quick Google didn't turn up anything 'free' for me.

Assuming you're using SMTP/POP3 mail in Outlook, how about deleting all tasks then re-importing them from the old Outlook .pst file?