Safari browser gamma differences, is there any solution?

1

As a web designer it is very annoying to see your website display different colors in browsers. The most annoying part is when the background color of your site does not match the color of your images for fading purposes and it has that “patched” looked to it. Is there a way to prevent this from happening ? for example my website www.beevp.com displays horribly at a friends mac computer. All the gray images stand out from the background. I havent found any good solutions to this.