OK, I know this is the 21st century, but there are a couple of floppies I needed to access and Ubuntu 10.10 couldn't read 'em. The floppy mounted, but with a disk in the drive I get "Media not found"....well, they work OK on Windoze.
I found the solution on another forum. The latest version of udisks doesn't read floppies, but an old version will. You can't downgrade udisks from Synaptic, but there's a guide to downgrade here:
It worked great, even for a n00b like me.
Unfortunately, this isn't too high on Canonical's list of bug fixes.