Sansa Fuze gets to song 254 and freezes. Goes back to a previous song and begins playing.

[ggin1]

As the 254th song goes into the 255th song, it turns an 8-bit counter (0-255) into all ones (FF).  The next song would turn on the 9th bit.  Of course, the counter should go higher than that because the Fuze can store more than 512 songs.   It seems that the processor song counter has a stuck bit.   If re-installing the firmware does not solve the problem, it is probably a processor problem.