I'm not sure if this would be considered a technical issue but it is something that I think requires a Zazzle fix.
I kept thinking something was wrong with all my seamless patterns when I applied them to wallpaper. Then I realized that it must be the wallpaper thumbnail that's wrong. The top image is an example of the seam thumbnail that appears when a square, seamless pattern is set to 'fill'. The second image is how the same pattern appears in photoshop at the point of the seam. Unless I'm missing something, there is no reason for this pattern to be showing a break at the seam. Customers will probably not purchase if they see the thumbnail and think the pattern doesn't line up.
