Yep, seen this many times myself. It's not the camera, it's the lights. My D300s and my D4 have both produced this result while shooting indoor ice hockey. Try shooting sometihing outside using the same technique with natural light and you'll not see this effect.
Coincidentally, I had a chance to shoot in an NHL arena last week (that was awesome). They had all of the TV lights tunred on and I didn't experience this effect at all. it sure made my post production process a lot easier. It would appear that the TV lights are much higher quality than what i've seen in our local minor league arenas. There are definitely a LOT more lights in there!