For releases that have a type and a subtype, such as http://musicbrainz.org/release/d5dc0659-b127-40c1-b72a-86c82ef00d4a where they are displayed in MusicBrainz as "EP + Live". Only the EP information is available in Picard scripting. Either the type should include the entire type + subtype string, or there should maybe be a separate subtype field.

This is important for people who like to tag live tracks by appending " (live)" as there is currently no way to determine that releases with multiple types are live.