Address Book stopped syncing both ways (phone to Mac and Mac to phone), everything else syncs smooth. Running out of ideas Tried resetting isync history, unchecking "All Contacts" to Selected Groups and re-checking back and forth, reading tons of threads, no solution yet. Wiping out database on my iphone is not an option: I just realized the bug today. I don't know since how long it's not syncing anymore, thus I will loose all the data I entered and modified on the phone since whenever the sync broke. Any tool/help to inspect the delta of the database on the phone and the Mac? (like "diff") ? Phone is jailbroken. Thanks for any hint!!!