iPhone sync problems "iPhone disconnected"?

[ekologik]

i got the exact same problem but found the solution. what was happening when you did it? like, did you add contacts or something? for me, i had added a contact, which didn't allow my contacts to sync for some reason. it was a specific person. i already had the entry added in my Address Book from Mail. i dragged the contact to my iPhone contacts group (which is the only group i have sync up with my iPhone, not the entire address book). this caused problems. so what i did was deleted the contact and entered everything from scratch. maybe whatever relationship was happening with that contact in Mail somehow messed something up? i have no idea... i just found the problem contact, deleted him, and re-entered him. that worked and everything is synced now. you could give that a try.