this is because of udev in base
The following are intended as suggestions to enhance the the ease of use; they are in no way intended to be derogatory.
If an application has limitations placed upon it, it is helpful to be forewarned by comments in the info file. In the current matter these could be the need to manually start dbus and that a limited amount of information is reported by the app.
A further idea; it will also be helpful if Disk-Utility is started from a small script which checks whether dbus is currently running, start it if needed, start palimpsest, when Disk-Utility is closed ensure dbus is at the same status as before running the script.