I wish I had my player with me so I could test this out. I'm pretty sure you just need to do an
fsck.ext2 /dev/hda5 It should complain that the filesystem is mounted and you could mess it up. I'm fairly certain this is ok if the filesystem is mounted readonly. Although I take no responsibility if it trashes your root partition. If it does do that I would think an upgrade would fix it again.
I vaguely remember doing just that when I forgot to go back to ro before pulling power. Again I have not tested that today. If you want to wait I will try it as soon as I get home and post my results here.
Brian
-See my empeg
here-