Perhaps you didn't notice the HUGE brouhaha over XFree86's licensing change with XFree86 4.4; 4.4.0 rc2 was the last under the old license.
Actually, you just made me think of something: perhaps X.org's republishing* of the XFree86 4.4.0rc2 code was what prompted the license change.
*(borderline stealing, a.k.a. nearly violating the "You can do what you like with the code except claim you wrote it" clause)
Peace, William
