The same happens to me with the floppy drive: once konqueror (3.2.3) has
accessed the directory, it cannot be unmounted any more.
I do think it is a bug in konqueror because the problem does not occur
when mounting, reading and writing from the console. However, the problem
does occur when mounting a removable drive from the command line and
accessing the mount-directory afterwards with konqueror: the drive cannot
be unmounted any more because it is still busy. Once konqueror is killed,
the drive can be unmounted without problems.
Any fixes anywhere out there?
Thanks
Chris