QUOTE(Bourne @ Dec 11 2007, 19:56)

Why is that, is this program crazy?
Pretty much. Whatever calculation is used is clearly obsolete, if it ever did make much sense. In this case it probably assumes that vbr is good and cbr is bad, without propely considering the effect of bitrate.
If the developers opened up this can of worms for updating, everybody would have a different opinion on how to quantify quality, so it is better to just let it go.