I can reproduce this bug in 5.10 (Breezy), but not in Dapper.
If I insert a CD, it is mounted, and Sound Juicer starts. After extracting the tracks, the CD is unmounted and ejected. If I insert a new CD (or the same one), it is mounted by Ubuntu, but the new tracks don't appears inside the Sound Juicer window unless unless you click on "Re-Read"
In Dapper, the tracks of the 2nd CD inserted are re-read automatically by Sound Juicer.
I can reproduce this bug in 5.10 (Breezy), but not in Dapper.
If I insert a CD, it is mounted, and Sound Juicer starts. After extracting the tracks, the CD is unmounted and ejected. If I insert a new CD (or the same one), it is mounted by Ubuntu, but the new tracks don't appears inside the Sound Juicer window unless unless you click on "Re-Read"
In Dapper, the tracks of the 2nd CD inserted are re-read automatically by Sound Juicer.
So it appears this bug is solved in Dapper.