For some odd reason, my iPhone has decided to stop syncing my music library. Whenever I go to sync with iTunes, iTunes keeps defaulting to NOT checking "Sync Music." Each time this happens, I've re-checked it and the memory bar at the bottom fills up with the size of my music library. But once I hit Apply or Sync, the bar goes right back down and none of my music transfers over. This has never happened to me until yesterday and I don't know what the problem is, as I haven't downloaded any updates to either iTunes or my iPhone lately and this just randomly started happening for zero reason.