It seems if you are adjusting the volume while the one line of the song information stops scrolling and next one starts, the backdrop of the volume scrollbar disappears.
Here’s a quick video of the glitch in action: http://jmr.sitesled.com/TEMP/sansafuze-glitch.avi
The file’s only about 1.7MB or so. I trigger the glitch twice in the video.
I’m currently using firmware V01.02.26A on an Silver 8GB Fuze. I’ve never notice the problem before the latest upgrade, so I’m inclined to believe that this minor glitch was introduced in the latest update.
(I’ve also been noticing an odd issue with the new replay gain features, but I plan on doing some more testing before declaring that the problem’s with the player and not with my mp3 files. ;))