Before creating a DVD of an old movie, I tried to free up some hard disk space by burning a batch of old cartoons (Betty Boop, from the '30s.) to a data DVD, and deleting the directory after making sure the burn was good.
The burn went fine, and the disc ejected correctly. (This is an important point!) I immediately re-inserted it so that I could check the contents, as I've done many times before, but it never showed up on my desktop. (F 10 with Gnome) I opened Nautilus and found two copies of the DVD listed, and both context menus listed both Mount and Eject, as though Gnome wasn't sure if it was or wasn't mounted. Checking, neither shows up in /media, /mnt or /etc/mtab. At this point, I doubt if anybody's surprised by the fact that I can no longer mount it or any other disc.
I've tried logging out and logging in, with no change. I'd consider a reboot, but my uptime has quite literally reached Biblical proportions and I hate to waste it if I don't have to. Does anybody know how to tell Fedora to let go of a DVD that isn't in the drive any longer?