dear group
I have the same problem. I sync with my SE W880i (with a mac meets mobile plugin) flawlessly, and after one year of perfect operation it just stopped working. Calendars and everything works but the addressbook doesn't.
I finally, after reset phone, delete all com.addressbook.plist, sync plist, deleting all contacts, reimporting them from a adress book file, and loosing about 2 hours of time
I came back to a backup of my adress book file, which I created 2 month ago.
Importing this resolved the issue, obviously loosing all info entered since my last backup.
This makes me think that the actual DATA in the adress book is the culprit for the isync app not to write data to my phone anymore.
This bug started with me after I did a sync with ME, the new service of apple. I do not know however if this is really related to this sudden incapability to sync my addresses to my phone or just a coincidence.
I have a really bad track record with all the apple services, which I use since they started to exist. .mac I do not sync since it always messed up my keychain data, EVEN choosing "do not update keychain". Sync with .mac also happend to write data of one contact into the file of another.
So every now and then I have to "clean" all my contacts which have other peoples emails etc.
Quite absurd. And now this.
w