I used a format value action in an attempt to create a tag from other existing tags that have multiple entries and it seems mp3tag ignores all but the first tag entry when running the action. eg
Format value NewTag using %genre%\%style% using the following as input:
genre=Pop
style=acoustic
style=alternative
creates a NewTag with Pop\\Acoustic as the entry... alternative gets dropped.
is there a way around this so that all values ascribed to a tag are correctly appended?