Welcome to LQ. .. ..
..
Floppy is considered unimportant by the Ubuntu people.
( I think, it was Ubuntu 8.10, having no floppy at all.
Then it came back, partly.)
Ubuntu 10.04 is the first with no rights for the user.
Even when the 'fstab' says "user,noauto" !
A workaround : sudo mkdir /mnt/floppy
sudo gedit /etc/fstab , and then add this new line :
/dev/fd0 /mnt/floppy vfat user,noauto 0 0
( Please hit <Enter> at line end, to have a "newline".)
Then you can mount dos and vfat. And read.
If you want to write to floppy : sudo cp <path>/<file> /mnt/floppy
If you have ext3 floppies, please create a new mount point e.g. /mnt/floppy3
... and add an "ext3 line" to fstab, with the new mount point.
...
Good luck.