Kid3 does not detect ID3v.1 tags
I've done something interesting here. If I apply ID3v.1 and ID3v.2 tags to a FLAC file I've made, it will show the v.2 tags as Vorbis comments in Kid3 and not v.1 in any way. I've tried the same with other programs like Tag&Rename and dBpoweramp's metatag editor and they also show Vorbis comments for something that should be ID3 tagging. MP3tag however gets it right but only interprets the v.2 tags as well.
Kid3: http://i.imgur.com/RyA7qOU.png
Confirming the FLAC file has ID3 tags via the file header: http://i.imgur.com/VYVdE5E.png
MP3tag getting v.2 right: http://i.imgur.com/TqruYej.png
Copy of test file: http://www64.zippyshare.com/v/88euAm7Q/file.html
Imported from SourceForge, author: groxxxy