There are two versions of a song featured in Season 5 Episode 15, "Play It Again, Jesse". The original version features a cover of "Rock and Roll Music" by Chuck Berry. I'm sure that due to licensing the DVD version was changed to a similar but different song. There are differences not only in the audio (you can see the mouths do not match up) but also in the visual. The DVD features a different angle of Rebecca & Joey dancing, along with dialog heard from Joey.