If you open a Claris Organizer 2.0 file from a floppy disk and Instant Organizer is active, you may have trouble ejecting that disk. Instant Organizer activates the file that was opened most recently and will not allow you to copy or remove that file until another file is activated. You can deactivate Instant Organizer by restarting with your Extensions off.
This will also be true if the file was opened from a SyQuest, Zip or other removable hard drives.