Kmail "saves" drafts in trash

Hi,

I'm using an up-to-date Debian testing with kontact version 5.6.3. I've just 
noticed a weird little glitch. When I create a new message in kmail and 
then select "Save as Draft" from the Message menu, the email is sent to 
the trash folder instead of the drafts folder. Has anyone else experienced 
this? Any clues about how to correct this? It happens every time I try to 
save a message as a draft.

Thanks,

Tim