I've also sent this issue via e-mail to the support team as well as posting it here.
Just finished playing through the newest episode of Sam & Max (Abe Lincoln Must Die) and loved it.
With one exception.
The song-and-dance routine...because it wasn't subtitled.
As someone who is hard of hearing I struggled to follow the song and eventually gave up and just waited for it to finish.
My suggestion would be to include some cheesy subtitles (like karaoke!) along the bottom of the screen with a bouncing ball following the words being sung.
From what I've read, everyone seemed to love this song, so I'm quite keen to find out what the hell they were singing!
Thanks for taking the time to read this.
Keep up the good work!