More on the Software Filtering Issue

The Economist mentions an interesting new detail about China's efforts to have all personal computers sold in China come with filtering software called Green Dam Youth Escort:

An American firm, Solid Oak Software, claims Green Dam includes stolen copyrighted code from one of its products, and has launched legal action.

I hadn't heard much about this Green Dam software before.  This certainly complicates things!

I wish I had more to say about the general issue of the requirement to install filterating software as a potential WTO case.  The trouble is, I'm a little fuzzy on the facts and the legal claims, which makes it difficult to say much.