Does the metering mode you set on your camera effect how the flash is metered?
The reason I ask, is becasue I was experimenting with fill flash yesterday. I set my camera to spot, so that I could judge the ambient exposure on my friends face. With my camera set to "M", I dialed in -1 2/3rd FEC and took the shot.
When I reviewed the image, the face was completely blown-out. Was this because when the shot was taken, the spot metering circle was over the background and not the face?

