Hi, I've noticed an interesting thing using my PB with Exchange. When a calendar event comes through, it shows up as a regular email message informing me of when the event is, unless there is another attachment. If there is another attachment, then the Exchange calendar event comes through as an ICS file which shoots right over to iCal, adding the event and giving me the opportunity to respond (tentative, accept, reject). I'm wondering why it doesn't always come through as an ICS file, and if anyone might have an idea of how to help Mail recognize it as such even when there isn't another attachment. Thanks!