IPhone Calendar Changes not Syncing with ICal

Question

Additions and changes to my iPhone calendar are not synced with ICal on my Mac. Syncing the other direction (adding or changing appointments on my Mac) works, but nothing I change or add on my iPhone appears on my Mac (the same seems to be true of contacts and notes). I have the same problem with an iPod touch.
Has anyone else experienced (and fixed) a similar problem? As it ism the iPhone-Mac sync only works in one direction!

Answer 1

I had the same problem, and then all my calendars stopped syncing either way. They picked a beautiful time to do it, too... right as I was leaving on a business/pleasure vacation where I was making on the fly appointments. grumble
However, I fixed it tonight. Here is what I did.
1. Back up (export) all your iCal calendars. (not just good practice, you'll need them later) Make sure iCal is closed.
2. under ~/Library/Application Support/iCal delete everything.
3. under ~/Library/Calendars delete everything
4. Sync your phone.
At this point you should have your phone overwriting everything in iCal. If your problem is ONLY syncing from phone to iCal you should be good to go, if you can't sync either way, you'll need to:
5. Drag all your backed up calendars back to iCal. In theory they will sort themselves out, but you might have some duplicates between stuff you've created on your phone and in iCal.
I don't know if this will keep the problem from occurring again, but at the very least, I was able to test out my ability to create events on either side, and it works.
I kept hoping that the last iPhone update would solve this for me, alas!