Because of some unfortunate circumstances I noticed I irrevertibly mixed up my sorted and retagged mp3s with an old backup. That means now I have files that are basically duplicates except for the id3 tags and paths. [FSlint](http://www.pixelbeat.org/fslint/) does a nice job of finding real duplicates, but is there any free tool to detect duplicate mp3s that differ in their ID3s? My preference is a linux tool, but windows would be acceptable, too.