Using Mac 10.6.8
Loaded several mp3 files. Then when selecting them to play, a single mouse click on the files kept selecting multiple files. This should normally be a two key sequence. Also, with a multi files are selected and highlighted, a single mouse click should then cancel out the multi select group and only the newest single file should remain.
Also, when I quit the box by selecting the red "X" it continued to play. To get it to stop I had to select the "Stop" button. It should probably stop playing with both methods.