Make sure the DPI resolution is 150 or 300, depending upon which template you're using. You can do this by going Image --> Image Size and changing the resolution (you'll then need to change the width and height back to what it was before, as it will change, before you click OK). When printing directly from Photoshop, make sure the "Scale to Fit Media" box is not checked.
Alternatively, you can use a cover-printing program to automatically print the covers at the correct sizes. Some programs are listed here: http://www.bootlegco...php?showtopic=9
Awesome thanks! It was the "scale to fit media" box. Unchecked it and it worked fine!