In my post dedicated to pi day, I happened to refer to a musical interpretation of pi. This video (while still viewable from the link I gave) has been forced off of YouTube due to a copyright claim. The video includes an interpretation by Michael Blake, a funny and avid YouTube artist. The copyright claim comes from Lars Erickson - he apparently says that he created a musical creation of pi first (and... I guess therefore no others are allowed...). In other words, it seems very peculiar.
I like Vi Hart's treatment of the copyright claim. For completeness, here is Blake's response.
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