I have no idea why it's happening, but I had the exact same error, and here's how I fixed it:
At the grub boot screen, use your arrow keys to highlight "kernel /boot/linuz-2.6.15-25-386 root=/dev/sda3 ro quiet splash" (your exact paths and numbers might be a little dfferent). Then type 'e' to edit the boot options; you will be taken to another screen. Append 'noapic' to the end of the boot options, and hit enter. Then just type 'b' to boot. Dapper should then boot normally.
To make these changes permanent, do the following:
Code:
sudo gedit /boot/grub/menu.lst
and append 'noapic' to the line the says "#defoptions=", then
Code:
and reboot. I took this help info from another post, none of it is original, but if I find the original post where I dea this, I will link to it from here.
~ Eric.
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