kid3 won't edit more than the first ARTIST tag in OGG Vorbis
The kid3 interface won't let you edit other than the first first occurence of ARTIST tags in Ogg Vorbis files, there is the possibility to do it manually thru the frames section but it should be easier.
vorbiscomment doumentation: http://xiph.org/vorbis/doc/v-comment.html
In this documentation they encourage the use of several ARTIST tags if necessary, this is a very neat feature since much music is created as a collaboration between bands (ex. Linkin Park feat. Jay-Z)
Changes that would have to be made to kid: The interface should show the same number of Artist textboxes as there are ARTIST tags within the file. The interface should have a "Add another Artist field" and "Remove this Artist field"
this might be the issue with id3v2 tags too, but AFAIK id3v2 only supports 4 predefined artists.
Imported from SourceForge, author: slimg