Microsoft Stoled .Net?

I had to put this out here.  In short a company is suing MS for patent infringement saying they have a patent on using XML to define web sites.  I think this is a move to get some free press and nothing more. 

It does bring up an interesting point about patents and software.  How can you patent software?  It is so easy to grab sample code from the net and tweak it to work in your application.  So, does the code have to be an exact match for it to be patent infringement?  Or is it sufficient to say that if software solves the same problem in the same way it is an infringement?  I think there is some gray area there.  Any Comments?

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