sys-apps/less is also being released under GPL-2, not just under the Less license. From the README: This program is free software. You may redistribute it and/or modify it under the terms of either: 1. The GNU General Public License, as published by the Free Software Foundation; either version 2, or (at your option) any later version. A copy of this license is in the file COPYING. or 2. The Less License, in the file LICENSE.
fixed in cvs, thanks for pointing that out