After filling in the tracklist and clicking next, you are brought back to the tracklist page with a blank tracklist and a list of red errors "A track name is required on track 1.", "A tracklist is required", etc.
If you want a CD toc to test,
http://test.musicbrainz.org/cdtoc/attach?id=Z62qYR26qt3yNeY00bh.PpzQOmY-&tracks=5&toc=1+5+91018+150+21199+28197+49295+70244
which is the TOC for (disc 1 of) http://www.sonymusic.co.jp/Music/Arch/ES/yuimakino/ESCL-3405/index.html