My AF assist light must have burnt out on my D50, it no longer works, Which is actually quite a problem since I am going to a concert on friday where I need all the light I can get. My Sb-600 will need to be on camera pretty much the entire time now. But I'm still under warranty so i'm planning on sending it in, (I'm assuming it will be covered, its definitely a wear and tear issue) Also my jog dial sometimes doesn't register steps to the left, So Hopefully they will fix that aswell. I won't be sending it in until the summer probably, I have too many races to shoot late april early may. And Having only the D70s would make my life more difficult than I want. Anyone else have their AF assist light burn out?