Just trying 4.5 for the first time. Up until now I've been syncing via MM Script <> iTunes <> iPhone 4
Started by clearing down itunes (unticking Music, syncing). It left the purchased ones on the phone.
Closed itunes, disconnected phone, started MM, reconnected phone.
Then synced some test tracks over in a playlist in MM. Played one of the tracks and altered it to 5*, then synced again.
Ratings seem to sync ok from MM > iPhone, but if I modify the rating on the iphone it doesn't seem to sync back.
Options enabled :
Delete files/ except: *.mp4,Smart*.pla,*.m4b,*.m4r,*.m4v,iTunes*,*.m4a, confirm deletion
Auto-sync files from pc, confirm updates