Nautilus treats all DVD as mime type inode/directory. As such, any action configured in System->Preferences->File Management for video (x-content/video-dvd) is ignored and the x_content_bar introduced in 2.22 is not shown in the file manager window. The mime data required for the correct behavior has been stripped from nautilus (http://svn.gnome.org/viewvc/nautilus?view=revision&revision=14425), as x11-misc/shared-mime-info is expected to provide it (versions >= 0.50, see link). So nautilus or some other package in the stack (gio/glib? gvfs?) should have a requirement of >=x11-misc/shared-mime-info-0.50 Version 0.51 seems to work just fine. Reproducible: Always
hum we also need to stabilize either 0.40 or 0.51, we are running a bit late on this one :)
With x11-misc/shared-mime-info-0.51 now stable this should be fixed. If not please try 0.60 and reopen with results of your testings. Thanks for reporting.