Four big tech players this week moved to improve their handling of open source software licensing violations. Red Hat, Google, Facebook and IBM said they would apply error standards in the most recent GNU GPLv3 to all of their open source licensing, even licenses granted under older GPL agreements. "There is no procedure in the older GPLs that allowed a licensee to correct his mistakes," said Lawrence Rosen, former general counsel for the Open Source Initiative. "This will make everything consistent with GPLv3."