I have two versions of LinuxMCE on my HTPC – stable 0710 and developer 0810. The 0810 was installed after 0710. So, the GRUB bootloader was placed on 0810 partition. A few days ago I decided re-install 0810 from the scratch and I deleted its partition including GRUB booloader. As result I couldn’t boot 0710 anymore. Thanks to GRUB power and flexibility I was able to fix that problem and watch Champions League 🙂 The solution is simple and clear: boot from any LiveCD, drop terminal and type following command there:
sudo grub
>root (hd0,0)
>setup (hd0)
That’s it. After booting from HDD the GRUB menu was found again.