Thanks! That worked (but see below). The "mm." part is what I was missing.
After I have confirmed that fetching with MusicBrainz works with a sample of CDs I went back to the CD that was causing the original problem (Miles Davis "Get Up With It" disk 2). There is no data from MusicBrainz for this CD, but there is data for disk 1! So it is apparently not a Max problem. I managed to rip disk 1 using EAC on a Windows system. Ah well.
Discuss Max, an open source CD audio extractor and audio converter.