Post date: Apr 17, 2012 5:23:47 PM
Check GRUB_TIMEOUT property in /etc/default/grub.cfg
and run sudo update-grub.
If this wasn't the case, try to run: grub-editenv /boot/grub/grubenv unset recordfail
(https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/512593)