Well this is very strange: I had my D90 for some time now with the 18-105 VR lens. Every time I had trouble with metering: matrix was all over the place and mostly gave me too light exposure and more then often the sky was blown out completely. Now I got a simple 18-55 II and: all problems are gone! Even matrix meters very good and only with very hard sunlight I need to adjust a little. So how is that possible? I had the camera and lens checked at Nikon service here in Portugal and they said it was "up to Nikon standards". I thought it was strange, but OK, I just ignored matrix and went with center weight. Maybe the VR lenses with more electronics are more prone to trouble?