Comment 1 for bug 407767

I am having this same exact problem with Karmic Alpha 6 (daily, actually). I have my install on an LVM2, so the desktop live cd is not an option. My boot partition is not on the LVM, however.
 I can try to install it on any partition, and I still get the same, identical error. It also fails when I try to use grub, and not grub2 option. I'll report back when I find a work-around. I've deleted the boot partitions and re-created them a dozen times. I have the problem whether I use ext2, ext3, or ext4.