I just returned from a trip out West with my newly acquired D90 with a Nikon 16-85mm VR lens. In general I found that the camera overexposes 1/3 or 2/3 stops. That is easy to correct, but inconsistent exposures are troubling. Here are a few examples from shots around Crater Lake in Oregon. In all cases matrix metering was used with 0 exposure compensation. Also, there was a polarizing filter attached, but I don't know how the filter was turned (in some pix it is obvious). When there is a high polarizing effect the exposures are good, but otherwise overexposed.