Movie download service CinemaNow has been signing deals left and right to make movies from Warner Bros., Disney and others available for purchase. Recently the site/service made headlines when it enabled customers to burn DVDs from the movies they purchased. BoingBoing, though, passes on word that the DRM the movies are embedded with is causing the DVDs to be almost completely unplayable. Apparently the DRM uses a land-to-pit ratio called the Digital Sum Value that is freaking out and causing completely unfixable errors. The problem is that this DSV is so random that when you introduce variables such as DVD burners, software, blank DVDs and ultimately players, the ratio is so fouled up as to be completely uninterpretable. So if you were all excited about this program and planning to try it out, take care, especially since CinemaNow has a strict one-copy-only restriction on burning.