When entering a new disc into Music Brainz and Picard, you "Lookup CD" which sometimes takes quite a long time to compute the disc ID. Then you "Lookup Manually", and associate the disc ID with the appropriate release. But to get Picard to assign the tags to your music, you have to "Lookup CD" again, which apparently recomputes the disc ID again. It would be better if the pressing "Lookup Manually" took you to a modal dialog where you pressed a button to say "I've Updated MusicBrainz, Try Again". Picard would then immediately attempt to lookup the new disc ID without recomputing the disc ID. Because of the occasionally long delay in computing disc IDs this circular pattern becomes very annoying and makes it feel like the two systems are poorly integrated.