I'm not sure if this is to do with Search or the Server (correct me please), but the Search server on NGS Beta 1 shows incorrect # tracks for multi disc releases. e.g.

http://test.musicbrainz.org/search?query=Luminous+Groove&type=release

The top release should really show 91 tracks, but it seems to have picked the figure from disc 3 (20 tracks).

It also highlights that release search should probably also have a column for # of discs. Perhaps a joint column with both figures (for saving screen real estate) would be a good idea. Of course there's the wider issue that results like http://test.musicbrainz.org/search?query=downward+spiral&type=release are not very useful now without any disambiguation by cat#, date etc, but that's probably a bigger issue best dealt with elsewhere.