"This is the first time that Microsoft has ever filed a
Linux patent suit over Linux, despite its multiple claims. That
said, according to Todd Bishop, "Microsoft says open-source
software is not the intended focal point of the action."
"In the past, Microsoft has supported legal action against
Linux. Microsoft infamously funneled money to SCO to fuel its
lawsuits against IBM and other Linux-using companies. With SCO's
complete failure to even prove that it had any rights to Unix,
never mind Linux, there was no longer any even half-credible legal
actions against Linux."