kubuntu session dissapeared from grub loader
I have Kubuntu 8.10 and Windows XP dual boot. The following problem occured while working in ubuntu and I'm not sure why (it might have something to do with c++ libraries because I was changing something in synaptic). Suddenly my system restarted and ubuntu is gone from the grub loader menu. I only see windows and ubuntu memtest86 stuff. When I boot from the LiveCD, I can access all my files on linux partition, so I guess that means ubuntu is there, but grub doesn't see it.
In /boot/grub/menu.lst file, there are only windows and memtest86+. I tried to add ubuntu there, but no success, I got grub error 15.
I don't have much experience in administrating linux (obviously)...
I would be grateful if anyone has an idea how to fix this (other than re-installing ubuntu).