Sometimes the music is mixed.

Are you sure you aren't playing 1.7.2?

Sure, I'm playing in minecraft 1.7.3 version

Oh I forgot something: most times is the old music, not the new music

Unable to reproduce, please provide a debug log by holding F3+C for 10 seconds, then copy and paste that information in a text document, and attach the document like you would a screenshot.

I have uploaded the crash file, and a audio (Really is a video, but it's too big) You can hear the medley from 1:50 I think. I don't know if i make it well. I will help at all I can. (Sorry for my english)

Is this still a concern in the current Minecraft version 1.7.4 / Launcher version 1.3.7 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

OK, I think that I did it, thanks.

Just for convenience, I reopened the original ticket as there were more and more re-reports of this issue.