If mount(8) is called with a relative path as the mount point for the 
filesystem, it will mount(2) it with the relative path. umount(8) will 
always turn a relative path into an absolute path before umount(2)ing the 
filesystem.  This makes it impossible to umount a filesystem that was 
mounted with a relative path.

Unless I am missing something, this is probably not the intended behaviour.  
But which one is right? I suspect mounting on a relative mount point is a 
bad idea but I could see some interesting possibilities.

-- 
Andreas Wrede              Planix, Inc.
andreas@planix.com         Networking, System Administration, Consulting
http://www.planix.com      Toronto, Ontario, Canada