How to disable borders when drawing a rectangle?

[Timo]

When I create a new PS (CS3) document and add two rectangles to it (fixed size, 1024x230), the other one gets gray borders around it. See the attachment for a demonstration. How can I disable these? The thicker gray area on the left is the canvas since I took an screen capture of the picture but the is a visible thin gray line dividing the two rectangles. I placed them so that the lower one is little bit overlapping the upper one. The thin gray border is on the right side of the rectangle too.

[mozartdminor]

that line is the white background, meaning that the rectangles aren't touching. on the layer with the bottom rectangle, select the move tool and press the up arrow on your keyboard once.