@Frank62Feb 13.2008 — #By cutting the left and right edges of your image some 5px. I can't tell which side has the lighter edge from looking at the image, I can only tell that one or both of the edges is lighter when I put them cheek to cheek.
@WebJoelFeb 13.2008 — #By just taking a 'center portion' that is excluded of the edges. Since this image repeat along the x-axis, it really only needs to be a pixel or two wide. I prefer several pixels wide... make it so one can actually see it while image-editing 'in real size' without having to magnify.
But one could just use your existing image and 'clone' the good part over the edges... also simple. ?