For the sake of people that find this bug through google, short recap:
Version: 4.0.1
This should be 3.12.0 (view3scene versions are separate from Castle Game Engine versions).
URL: http://castle-engine.sourceforge.net
More specific URL is http://castle-engine.sourceforge.net/view3dscene.php
License: LGPL-2 + extention allowing statically linking to non free software
This should be GPL (view3dscene, unlike Castle Game Engine, is only under strict GPL).
Regards, Michalis