Lilo: "L 99 99 99 99 99 99 99 99″

I compiled a 2.6.16.2 kernel a while ago, and finally got around to rebooting into it. My hd config was insane so I feared rebooting - and apparently rightly so. Anyhow, I got the following unpleasant error from LILO (analogously from grub, by the way):

L 99 99 99 99 99 99 99 99 …