Hey, I am getting those square shadows too! But only on some airplanes. I have a radeon 9000 32mb, p4 2.2 GHz mobile, 640b crucial ram, 40 gig HD, and I get anywhere from 40 to 180 fps on my laptop. It doesn't lag but those shadows are getting annoying. I think theres a glitch or something with these radeon cards, I'm not sure.

Happy Easter!!!

Matt