The suit appears to have been initiated by Music Copyright Solutions (MCS), which claims to administer copyrights for more than 45,000 compositions. MCS is named as the lead plaintiff, along with a number of songwriters including Mark Farner of Grand Funk Railroad fame. These folks allege that Microsoft, Yahoo, and RealNetworks improperly licensed the rights to more than 200 compositions that they offered as on-demand streams or limited downloads via the Zune Marketplace, Yahoo Music, and Rhapsody.

Surely these companies paid somebody for the rights to offer these songs. But there's a catch, which TechDirt pointed out earlier Tuesday: these companies may have licensed the rights to the recordings, but that doesn't mean they licensed the rights to the compositions (also known as publishing rights).

More: http://news.cnet.com/8301-13526_3-10276724-27.html