Sharp Edges

[makainc]

I'm trying to make the edges sharp, when I use the Rectangle tool there is a 1px line on the edges which I think is suppose to blend the image to the background, but I don't want this 1px line, I want the edges to be sharp. How do I switch this off.
Using CS2, and I'm sure this is a default setting because I remember reading something about it in the book but now I can't find it.

Thanks

 

[PixelPusher40]

in the control bar at the top there is a 'feather' option when you have the Rectangle Marquee tool selected.

My guess is that you have it set at "1"... change it to "0"