When I right-click on some mail folders containing sub-folders and choose "Delete", and then "Empty Trash", the pointers are deleted from the mail_items table for that account, but the message files remain on disk under the store directory.

Empty Trash works ok for individual items, but there seems to be a problem with it recursing through sub-folders.

Before I raise a bug I wondered if anyone else was aware of this issue, or if there are any maintenance scripts I should be running to take care of orphan message files?