Hi Fleet,
Sorry to hear about your trouble there. Usually what causes this to happen is when one of the music files is corrupted, although it may be some sort of multithreading race condition on certain computers. Regardless, this has only happened for 2-3 people that I know of, and it happened consistently for them and not at all for anyone else. The beta prereleases should resolve this for you -- the current one is ZF, in the main forum. If that doesn't do it, can you post the new error that you get with the latest prerelease? But, it's fixed it for the other couple of folks, so hopefully that will do it for you, also.
Thanks for your support of the game!