If you are using an infinite light as a shadowcaster, double or even triple its bias (0.800 to 2.00 or 3.00). Different objects get effected in sometimes worse ways than this. This stuff pops up all the time. If you zoom in on pic2, you'll see a lot more of it on a small scale. On the .pmd's...I'm a strong advocate for disabling the bastards. This (yours) is a good example. You probably already disabled it but some residual in your library is still loaded with it. It then trashes your PZ3 for not having it(mho). Shoot it twice and then stomp on it(mho). And be careful what you delete