For those who still need to use floppies, it seems that floppy drives are not fully supported in Ubuntu anymore as there is no out-of-the-box solution that would work.
However, you can always mount the floppy manually:
1) Make sure that the floppy drive is properly connected to motherboard and that (internal) floppy access is enabled in system BIOS.
2) Start Ubuntu and create directory
/media/floppy or something similar.
3) Mount the floppy by
sudo mount /dev/fd0 -t auto /media/floppy.
You should be able to access the floppy either trough terminal or GUI programs.
Make sure to unmount manually when you’re done to prevent data loss:
sudo umount /media/floppy.
Note that the GUI access *does not* work so do not try to access the floppy via Nautilus or Konqueror or such before mounting manually (step 2).