Over the past week or 2, several times now, I'll get a series of email notifications (sometimes as many as 10 or so, a few seconds apart), but then there won't be any messages. I'll check later, but still nothing. I have a POP, gmail and an exchange account. I'll also sometimes have POP email keep coming back, sometimes 5+ times, after deleting it every time. It may be 30 minutes later, or hours later.