reset sync history
you may want to reset your sync history using isync. This is the problem I"m having:
I've set iTunes to "Put new events creatd on this iPhone into the calendar" to my "Home" calendar, but when I create a new event on my iPhone and sync, the event shows up in the Read-Only "US Holidays" calendar (it's one that I subscribe to from Apple). I've tried the "Reset Sync History" feature in iSync several times (rebooting afterwards) but the problem persists. Arg!