I've been trying to figure out how to sync my local files from my Mac to my iPhone for a week now to no avail. I'm connected wirelessly and it shows my device, it pulls up all of my playlists and every song in those playlists are local files. When I choose "Manually choose playlists to sync" and click on the playlist, all checkboxes disappear and it just sits there. Under my local files playlist, it says "Only local files synced".

In part I downloaded the Spotify for iOS 4 from the App Store and that sync my music perfectly. So it points to a programming issue with the latest version of Spotify for iOS. If anyone has any suggestions, that'd be greatly appreciated.