openSUSE 11.4 / Gnome 2.32.1 / Evolution 2.32.1

I have a corrupt 'sent' folder in Evolution. Sent messages are always recorded twice in 'sent' folder, though only one copy is actually sent to the recipient. Occasionally when reading one of the duplicated entries, Evolution will complain about a hopelessly corrupt folder.

How is the best way to repair a corrupt 'sent' folder, with the least pain? Thanks.