I'm experiencing an annoying bug in Mail 2.1. I have Mail configured to check four email accounts: two professional and two personal. The professional email accounts have signatures. The personal ones do not. When I create a new mail message from either personal account (either by creating a new message or responding to a personal message) the signature from my professional account appears at the bottom of the personal email, even though the Signature pop-up shows "None." Clicking the pop-up and re-choosing None (the only choice under the pop-up since there's no signatures defined for the personal account) causes the unwanted signature to disappear. I recently moved my email from one Mac to another and the problem persists. If it's a corrupted support file, it could be that I moved the corrupted file when I migrated my email. Is anyone else experiencing this? Any suggestions for fixing it?