Random BedHead Ed writes "Groklaw has some interesting new information online. In an entry today, PJ has posted the Deposition of Erik W. Hughes (PDF), a SCO employee. Hughes' 2004 testimony reveals that the Linux Kernel Personality (LKP) of UnixWare somehow used kernel code. Exactly how it was used is not clear. UnixWare was released under a proprietary license, but the General Public License under which Linux is distributed requires derivative works to use the same license. As PJ says, it's "now apparent why SCO tried to say the GPL is unconstitutional" back in 2003."