Thanks in advance!
Here's the URL: http://lavieenvert.com.br/
If you check it on Safari, FF, and Chrome, your will see inconsistencies on all three. I'm not sure how to make it work. I'll paste the CSS below, but basically, I have the main image centered on the page, then a 9px wide slice of the far left of the image to be used as a repeating background, horizontally. I can't seem to line up both pieces. Obviously something wrong with my math. The main image is 730x450, and the slice is 9x450. And below is the CSS: