Has Microsoft's Patent War Against Linux Begun?

Glyn Moody writes "Microsoft has filed a suit against TomTom, 'alleging that the in-car navigation company's devices violate eight of its patents — including three that relate to TomTom's implementation of the Linux kernel.' What's interesting is that the intellectual property lawyer behind the move, Horacio Gutierrez, has just been promoted to the rank of corporate vice president at Microsoft. Is this his way of announcing that he intends going on the attack against Linux?"