Why does iMovie screw with darkness when you import movies? The results are terrible. Can't it leave the movie intact as it is? It seems to adjust the darkness settings so that you see bands and pixels of black/grey in any nighttime videos or any video with any dark areas. I have resorted to not using it for any night or fairly dark videos. It is just stupid. And you can't turn it off! Adjusting the brightness settings don't work because the banding happens at import, turning up or down the brightness just makes your video too dark or too bright with banding.