Since I trialled the MobileMe Mail beta, Mail.app has a new Junk folder (since it now lists my MobileMe account as a new mailbox at the bottom of the left hand column, with its subfolders including Junk). This matters because it is collecting individual junk messages and flagging them up on the Mail.app dock icon badge (I insist on having folders other than Inbox flagged up, but there is no way to specify WHICH folders other than Inbox). In order to disable this behaviour I have abandoned the Mail beta, which allows me to go into prefs and turn of MobileMe junk filtering. However it is STILL there and still adding new junk messages!
According to Mail Help if this happens I simply turn on Junk mail filtering in Mail.app - and lo and behold, it works. But of course I need to leave it switched off in order for SpamSieve to work. Any ideas how to lose the MobileMe account from the side panel in Mail.app?