Version differences[edit]
There are two versions of the Super NES game. Version 1.1 featured completely different music tracks for the second and fourth worlds.
http://en.wikipedia.org/w...ki/Krusty's_Fun_HouseTheoretically, the v1.1 cartridge would either have a "-1" Part # or would be stamped with an A on the back of the cartridge:
[img width=700 height=525]http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/9rQAAOxyJX1TBkwu/$_57.JPG[/img]
EDIT: FOUND ONE!
[img width=700 height=525]http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/WH8AAMXQ1ZhTe4Rk/$_57.JPG[/img]
Changes in music usually have to deal with licensing deals - maybe they weren't approved to use that music. The composer for Krusty's Fun House was David Whittaker, who left for Electronic Arts shortly after the game was released. It's possible that a previous agreement fell through and they had to replace the music for those stages, or some other arrangement... Unfortunately, you likely wouldn't know unless you asked the guy himself.