It's a new problem - though what I've changed in my system I couldn't say.... I use Microsoft Office 2007, I run Vista and use a Treo 750. Suddenly, "calendar" doesn't show up in the list of sync contents. I have: email, tasks, notes, mobile favorites, and one note - but no calendar. I've tried adding to the outlook calendar first and getting it to sync to my treo, then vice versa.... I really think that feature used to work. am I crazy? hope there's a good soul out there who can help!