Same thing with me
Just had the X50 a week and synch to my home PC using Outlook and work PC using Intellisync. Haven't even had a chance to really work it yet.
On my "start"(?) screen it shows my appointments for the day but I click on Calendar and it says "No appointments". The synch appears to run OK. Everything is showing on the desktops.

Checked the website, manual and Intellisync help but haven't found anything.
BTW - this thing beats my old Handspring Prism - er - "hands down".

Color's better, bigger screen, WIRELESS!! (oops. sorry)