Okay, I ran it and I have the "mumble" file and I'm emailing it to you.

But ARGH, I just found out why I keep having to FSCK...

It's just as I feared. Whenever GPSApp is running, I can't set the hard disk to read-only. At the shell, I did RW, created the Mumble file, and then when I do RO, it says

mount: / is busy

And never sets the drive RO again. This counts even for using the Hijack commands to set things RO again. Nothing ever goes back to RO as long as GPSapp is running. So that's why I keep having to FSCK, because I keep rebooting the player with the root directory in readwrite mode.

How do I kill the GPSapp task so I can set things back again?