Did you have a file that was stopping the Fuze during Refresh? When it goes back on the Fuze, your problem may recur. If it does, remove the most recently added music and cross your fingers.
Try fixing any trouble albums. Actually, it helps to run every album through mp3tag before adding it to the Fuze. As explained here:
http://forums.sandisk.com/t5/Fuze/Files-appear-on-computer-but-not-on-Fuze/m-p/248900#M49238
