Over on brainz.org they have a great write up about DMCA takedowns. DMCA stands for Digital Millennium Copyright Act. Its a piece of legislation that was supposed to protect the rights of the copyright holders in the new digital millenium.
Like any legislation, it can be used for good or for evil. Fortunately, the folks over at Brainz.com have broken down how a DMCA works to show us how to file a DMCA claim to protect our copyrights. They also show you what you can do to counter a fraudulent DMCA claim that has been filed against you.
To quote brainz.org:
The DMCA process, whether on the filing or receiving end, should never be taken lightly as missteps could, and often do, have very serious legal implications. If you are unsure about what to do in a specific situation, consult an attorney.