Hell that's nothing, I just flicked over to see how my B-Spec 24 hour Le Mans was doing. It was night but there was no track. I could just see cars, selected walls/buildings and this weird green glow in the sky. There was no track at all, it looked like the car were flying because they were perfectly lit up due to the lights on that course. I was going to take a picture, but before I did I wanted to see if I changed view to another car and back if it would be fixed. Unfortunately when I changed to another car the whole screen was blank except for the HUD etc!
I presume this is just a little one off glitch, but having been the first time i've seen one of my 24 hour races at night it may happen every time for all I know. It may also be due to the fact my PS3 has been on for like 10 days straight doing B-Spec.