Shoutbox

As you might have realized in my new sig, there's a white frame around the contact card.. now when im posting and that the post has a white background, everything's cool.. when its on a blue background.. then its not pretty.. here's a screen of what im talking about : http://www.geocities.com/l_p_15/fix.PNG

You guys have any clue how to make it disapear? I tried to put it in gif but all the quality went away ..