Bug#390029:

[Michael Gilbert]

$ mount /cdrom

$ mount | grep cdrom
/dev/hdb on /media/cdrom0 type udf (ro,noexec,nosuid,nodev)

$ ./disc-test /dev/hdb
/dev/hdb contains a Audio CD

$ ./disc-test /dev/cdrom
/dev/cdrom contains a Audio CD

$ ./disc-test /media/cdrom0/
/media/cdrom0/ contains a DVD
URL for directory is dvd:///media/cdrom0/

looks like "disc-test" is incorrectly detecting the dvd as an audio
disc when using the device files, and correctly detecting the dvd as a
dvd when using the mount point.  anything else i can do to help?