After looking at the output from list_cddrives I think that this bug is filled against the wrong package. I can reproduce it in nautilus' CD/DVD creator and therefore I change to package to nautilus-cd-burner.
** Changed in: rhythmbox (Ubuntu) Sourcepackagename: rhythmbox => nautilus-cd-burner -- An error in Rhythmbox burning dialog - endless list of repetitive speed values https://launchpad.net/bugs/55327 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs