The Gentoo handbook at http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=10 recommends the command "grub-install --root-directory=/boot /dev/hda" While this seems to execute fine, there is a typo in the output: "If any of the lines is incorrect" should read "If any of the lines are incorrect". Reproducible: Always Steps to Reproduce: 1. Run "grub-install --root-directory=/boot /dev/hda" Actual Results: Typo in output. Expected Results: Correct English in output.
Afaik "If any of the lines is incorrect" is correct. "Any" can be used both with singular as plural meaning. If you can prove the contrary, please file a bug at http://savannah.gnu.org/bugs/?group=grub since this is an upstream issue.