I've updated my GLScene for Lazarus install (
http://www.skinhat.com/lazarus). It uses the stable Lazarus version 0.9.10. There are also a few more demo's working such as the GLScene terrain demo. I've moved non working demos to a directory called 'brokendemos'.
I've also updated my '3D development pack' (
http://www.skinhat.com/3dpack) so that it uses the above Lazarus (0.9.10). The pack also includes the latest Quark (6.5.0-alpha2) which means it includes Quarks new terrain building features.