Boot error

[Azyx]

I installed Ubuntu 10.04 LTS on a machine with 8.04 LTS, and have dualboot between those i system.The problem is when a start a get a message:
'Boot error'
If I hit 'Esc' I get to the Grub -meny and can boot as normal.
Anyone knowing the problem?
Cheers

[siddhanathan]

I got a similar error after doing some updates on 10.04 after which I decided not to dualboot... GRUB was not being read properly for some reason...