I have been using Picard for years but have always had problems when it comes to Picard saving tags with multiple values (e.g. Composers, Producers etc) Whenever I tag something it only ever saves the first entry of a field with multiple values unless I manually edit the tag to all be on one line which is time-consuming, especially with a large collection.
So am I missing something? I have Picard set to ID3v2.3 and use ; to separate multiple values