Bradley Kuhn of the Software Freedom Law Center (SFLC) recommends that projects using GPL version 2 upgrade to the newer GPL version 3. One of the features of GPLv3 is better protection against possible patent threats than its predecessor. The recent patent litigation between Microsoft and TomTom and subsequent out of court settlement is the reason for Kuhn's detailed posting, TomTom/Microsoft: A Wake-Up Call for GPLv3 Migration.