Comment 46 for bug 477104

Have the same error, Karmic, x86_64 (grub prompt, grub fails to execute grub.cfg).

Here are a few (possibly new) symptoms:

* grub.cfg looks fine when editing using vim after booting the system using grub shell commands
* however: when using cat /boot/grub/grub.cfg from the grub shell, it shows the content of a different file. (grub root is the loopback device, I can also see my home folder in there). When updating grub, this moves (I had several different binary or text files coming out as grub.cfg)

Could it be grub has trouble reading ext4?