Fat32 long filenames patent invalid because of prior art?

Is seems Linus Torvalds has helped shoot down an important fat32 Microsoft patent, see this a 20 years old technical discussion on comp.os.minix: http://groups.google.com/group/comp.os.minix/browse_thread/thread/d2b819a69ae0fc4a/09ef13bc629e9d8b?lnk=gst&q=%22long+filenames%22#09ef13bc629e9d8b

For the patent office there is enough inventiveness in an idea born enumerating some possible solutions that came in mind after reading a question to make a patent. How ironic that a patent used to damage linux has been invented by its author

More info on: http://www.wired.com/wiredenterprise/2012/03/ms-patent/