Comment 4 for bug 123102

As a beginner with Linux in general and Ubuntu specifically, I was struggling with exactly the same issue, starting with Feisty 7.04 and all the way through up to 7.10 tribe-3 right now.

For me, the grub-installer: section in my user.log reads exactly the same. I'm having '/' on a 10GB JFS and tried to get /boot on a 24MB JFS as well, which always failed with the same error message as described by the OP.

BTW, it also is kind of poor, especially with Ubuntu Desktop being targeted to Linux beginners, that if /boot is only 14MB, what I had at first, you get the same stupid error message about grub-install, but no hint whatsoever, that /boot simply being too small is the *real* problem.
How is a beginner supposed to find out about that?