Reminds me... didn't OS/2 have the capability to store both short and long file names on a FAT16 partiton? How does that go with MS' patents? Where MS really allowed to file a patent on something that already existed?
I think the actual question is how you want to invalidate the patent. As far as I remember it costs even money if you want to attack a patent that you think is prior-art. How does that go with the work of volunteers...? I am involved in other FOSS projects and I would not want to sue someone else on behalf of a project or to be sued instead of the project. At last it is a volunteer's work ...
Just my 2 cents,
Oliver