In bug 23309 we disabled partition table probing for floppy devices. Unfortunately, the partition table prober is also used for determining if media is inserted by setting DKD_MEDIA_AVAILABLE. So media detection on floppies is now broken. We should move that detection elsewhere.
Fixed (and also tested with GNOME): http://cgit.freedesktop.org/udisks/commit/?id=c8d02e0cc26a7559063b98de05f8a4ee07f1de2b
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.