I was upgrading my system from 12.04 to 12.10, everything went along fine. I got to the section when I was told to reboot, so I clikced reboot and the system started to go down for reboot then just hung. I had to manually reset the computer and now when i try to boot i just get a grub rescue prompt.
booted with a 12.04 live cd installed boot repair tried the "recommended" option, no dice.
so here's the link to my log file from boot repair