From the replies on Kubuntu Forum, with Kubuntu Natty the following mount commands work ...
Mount floppy after insertion with ... udisks_--mount_/dev/fd0
Unmount floppy before removal with ... udisks_--unmount_/dev/fd0

Taking bits from the Forum replies and other sources I now have a stable floppy disk usage system (Google is good for any technically detailed searches) ...   
For formatting a floppy disk, kfloppy only worked after checking which components should be installed in the Debian kfloppy programme package, and
then installing the two Perl Libraries that seemed to be missing. ( libqtcore4-perl and libqtgui4-perl ) 
Details at http://packages.ubuntu.com/natty-updates/kfloppy

kfloppy must be root - kdesudo for kde utilities gives a very nice looking password alert.
kdesudo_kfloppy opens it as root, then a "Full format" using "Auto Detect" and "DOS" settings works well. The floppies mounted each time
as they had a good file system that could be mounted.         
Using the "ext2" file system setting would not work correctly with kfloppy and at the end of the formatting gave various error messages.
I then noticed that on "mounting" the floppy, if you heard a "click" with a reassuring green light for a few seconds,
the disk DOS file system was correctly mounted. (use the mount command to check) 
After trying to format a disk using ext2, on "mounting" the floppy I heard a "click" with once again a green light,
but then after a second, another "click click" and after yet another second, the light went out, but that floppy
had not been mounted.(use the mount command to check) The broken ext2 file system on the disk could not be mounted.

When writing or saving to the floppy disk, Dolphin makes it easy to copy a file to the floppy mount point at media/floppy0, but the actually
writing to the floppy disk problem was solved by using kdesudo_dolphin to open Dolphin as root and changing the Permissions on the
floppy drive at  /dev/fd0 to Read and Write for "Owner" and "Group" in the Advanced settings. Then on the mount point at /media/floppy0,
in the Advanced settings changing them to Show Entries, Write Entries and Enter for "User" and "Group" leaving the "Others" just having ticks on Show Entries and Enter.
A tick also appears in the "Sticky" box. (I believe it takes no part so I just left it there)
The writing to disk is done shortly after the "Paste", or following the "unmount" command if the "Floppy"  page was not actually open in Dolphin.
When I changed the permission settings at a location using Dolphin as root, if trying to change the settings of all the users at once, an "Access denied"
alert message appeared, but changing one user at a time was accepted.