I downloaded the Facebook app a couple of months ago and I'm having an issue with the contacts sync.

I've turned sync on within the Facebook app and it works fine. Everytime I sync with my Mac though, the Facebook sync on my phone turns off and all the info that I had disappears, leaving me to re-sync again.

I do periodically get a popup when I connect my phone that says "Syncing now will change more than 25% of your contacts, do you wish to proceed". No matter what I do at that point (yes or no) it still turns the Facebook sync on my phone off.