Allan Chen , Jan 02, 2008; 01:09 p.m.
That's pretty weird. I would think that program mode would be the same as choosing aperture or shutter priority, except it's choosing both rather than just one in response to the other. And I shoot in aperture all the time, no compensation, and I'm not seeing any consistent overexposure issues, much less by 1 full stop. I'm quite happy with the metering on the D300, in fact. Did you drop into spot metering by accident by any chance?