A company, Media Rights Technologies, has filed suit against Apple, Microsoft, Real Networks, Adobe and others for violating the DMCA by not using their product. There product even works plugging a hole so that when it is played back it still can't be copied.
To me this is a desperate attempt to get business and force people to use their software and a real weird take on the DMCA.
I doubt this will get anywhere and the companies that they are suing have a lot more money than they do.
If you can't sell a product, you can't threaten them in court. Get a clue and a life!
You can read more on CNET, Apple, others draw legal threat over media players.