I haven’t checked how extensive the problem is, but there is at least one specific album I can not get Jaikoz to download the album covers for.
Release ID in Jaikoz:
847dcc4d-9713-4f7f-9ed2-d7e60f1a45ea
Album:
http://musicbrainz.org/release/847dcc4d-9713-4f7f-9ed2-d7e60f1a45ea
Front and back covers:
http://musicbrainz.org/release/847dcc4d-9713-4f7f-9ed2-d7e60f1a45ea/cover-art
Jaikoz settings:
Musicbrainz > Format > Artwork:
have tried both “Replace if better quality” and “Replace if Empty”
Upon ‘Action > Remote Correct > Update Metadata from MusicBrainz’, it does not download the album art.