VOBDNorm really had one release and it was considered experimental. I've never had an issue with it though.

It's a command line only proggie and a bit hard to get your head around.

The real down side is it works on a per VOB file basis. That is if you have it edit VTS_01_1.VOB, then you have to do VTS_01_2.VOB... etc. (If there is a way to make it do an entire VTS in one command, I've never figured it out.)

On the up side, you can specify which audio track(s) you want altered. The changes do not have to be applied to all tracks.

Edit: Turns out VOBDNorm also works (possibly unintentionally) with standard mpeg files. So you can mux an mpeg video with a Dolby track and rewrite the D.Norm, then demux if you need a raw track. Much easier than working with VOB pieces parts.