I have an intermittent problem deleting email. This is a recent problem that has never occurred before, so it may be a problem with a recent update. Usually deletion works fine, but occasionally when I try to delete a single email, nothing happens. If I shut down and restart Thunderbird, the email can be deleted with no problem. This seems to happen right after I "Get Messages", or after I try to delete while new messages are or have just finished loading. Any suggestions?