This CDStub is a Various Artists CDStub: http://musicbrainz.org/cdstub/QyIgWr0gldITp7mUCS7AKrDSWtQ-

When you try to import it from the release editor, it doesn't import track artists.

The root of the issue seems to be that the JS WS doesn't return artists:

http://musicbrainz.org/ws/js/cdstub/QyIgWr0gldITp7mUCS7AKrDSWtQ-

{"tracks":[

{"length":"3:55","name":"Only Girl (In the world)"}

,

{"length":"3:19","name":"10 Minutes"}

,

{"length":"3:09","name":"Higher"}

,

{"length":"4:43","name":"Hello"}

,

{"length":"3:08","name":"Tik Tok (feat. Sean Paul)"}

,

{"length":"3:03","name":"Do It On My Own (feat. Craig David)"}

,

{"length":"3:12","name":"Losing Control (feat. Deeci)"}

,

{"length":"6:10","name":"Dance In The Dark"}

,

{"length":"3:21","name":"Seek Bromance"}

,

{"length":"3:29","name":"Club Certified (feat. Akon)"}

,

{"length":"3:18","name":"The Rain"}

,

{"length":"3:33","name":"Why don't we just Fuck"}

,

{"length":"3:30","name":"Downtown"}

,

{"length":"3:34","name":"Dans Ma Party (feat. Willy William)"}

,

{"length":"2:49","name":"I'm in Love"}

,

{"length":"3:05","name":"Tick Tock 2 D Beat (feat. Shugga)"}

,

{"length":"3:58","name":"O'Phone"}

,

{"length":"3:07","name":"Open Your Eyes (feat. Laura Zen)"}

,

{"length":"3:21","name":"Hier Encore"}

,

{"length":"3:05","name":"My feeling for You"}

,

{"length":"3:46","name":"Angels"}

,

{"length":"3:18","name":"Live Your Dreams (feat. Soraya)"}

],"toc":"1 22 350522 150 17798 32693 46856 68072 82150 95867 110301 138020 153073 168715 183564 199519 215285 231334 244012 257894 275730 289769 304875 318719 335653"}