I realise the issue is not duplication here, but how could a reasonable person not just roll their eyes and sigh if two lawyers were standing in-front of you duking it out over how completely different their VFAT implementations are (or not) because it slips though a loophole that somehow escaped the prolix that is a software patent.
I completely blame Microsoft, however. By forcing the TomTom issue they showed intent. If the best they can come up with is to sue over a file format vaguely more complicated than what we expect undergraduate students to implement to pass a basic operating systems course, then they are justifiably doomed.