brandibook

I have been reducing some artwork in paint.net from 13x19 to 8.5x11. I started printing the 8.5x11 and down the edge of the paper is a very polite, vertical line. It's not in the image. I though at first it was my printer. Then I tried printing the same image in two different programs, paint and adobe elements, and the line is not there. Just wondering if this was a known bug and if so how to fix it. Thanks, Brandi