The D80’s metering algorithm is different to that of the D70s and the D200.
It was appantly intended to give more immediately impressive results for first time SLR users, but for me it’s always unpredictable and almost unusable in matrix mode.
Far too many blown highlights and massively inconsistant.
Better in c/w or spot modes, much more consistant.
I borrowed a D70s and a D200 to compare and find both to be more cautious with metering, leading to fewer blown highlights.
Many, many people complained and the firmware was updated, making things slightly better.
If you have a spare few months there is a huge thread on the ‘Nikonians’ site and Thom Hogan has mentioned it a few times.
I still love the camera, but it may take a bit to get used to if coming from another Nikon.