Why does Mail 4.5 tell me it could not move a message to the mailbox "Trash" because it already exists? This just started happening about 2 days ago. After an update. I made no changes to my Mail preferences.

Why does Mail 4.5 tell me it can not move a message to the mailbox "Trash" because it already exists? This just started happening about 2 days ago. After an update. I made no changes to my Mail preferences. The only way to fix this seems to be to do away with the "Trash" Mailbox. I would prefer not to do this. It makes recovering a mistakenly deleted message almost impossible. I get alot of similarly headered messages and this is a major pain! Has anyone else run into this and why did it just start happening? I've been running Mail Ver 4.5 in Snow Leopard for over 10 months and this just started after a software update a couple of days ago.

Any thoughts would be appreciated

Ron (HMBGENO)