I'm running Mac OS 10.6.6 and my Address Book stopped syncing with my iPad, my Palm PDA and my Google phone. It simply recognizes and syncs addresses as of a week or so ago. Any contact info I've added in the to Address Book in the last week won't sync over to any of the devices. I even tried using "Replace info on this iPad" with Address Book clicked, but it still didn't transfer the recent entries onto the iPad.
What can I do. The problem seems to be in Address Book since it happens with all three devices, but I don't know what to do to fix it.