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IMHO it is also true for most linux projects. Who know, the PHP, Python, Apahce, Samba, gcc, glibc, gtk, kde, mozilla, openoffice, wine, lazarus, gambas, kdevelop, etc doesn't hurt any M$ patents ? Propbably the most of linux projects can be sued by software patents...
Off-topic (you may vote this down), but why do you call these projects linux projects? None of them is Linux-bound. Open source is (much) broader than Linux!