unable to umount USB media in GNOME

[Vanco, Don]

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=107844

Cannot unmount USB (CF) storage from in GNOME.
If I mount removable media (I have a USB attached "6-in-1" media reader)
while in GNOME I cannot umount until I log out.  If I simply mount via an
xterm and do _nothing_ else (not even an "ls") I can then not umount without
getting a message similar to:
umount2: Device or resource busy
umount: /mnt/usb is busy

I am NOT leaving any nautilus browsers open / focused on the mount point.
I do NOT have any users in the mount

"fuser" shows nada

I can mount and unmount to my hearts content from command line on VC1 even
if the GUI is logged in.
Don