It would be cool if mp3diags could check for mutt rips. In case you're not familiar with this term it is basically a check to make sure that all of the tracks from an album have the same rip settings. This is to help insure that they all came from the same source.
Currently all checks are done for a single file, and this would require a comparison of a group of files. A related thing I was looking at was detecting albums with missing tracks. I made a note of this "mutt album" detection, but it's not going to happen very soon, because now I'm just trying to wrap up the 1.0 release and I'm not making any significant changes, as this would require.