etch grub adds a 'savedefault' option to menu.lst and the lens in the package currently fails at parsing that option. it was fixed on upstream repository:
http://git.fedorahosted.org/git/?p=augeas.git;a=blob_plain;f=lenses/grub.aug;hb=9c0cfeb18285cab1b95486cc61e9111b67754d65 pietro. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org