SECURITY.NNOV: ikonboard 3.1.1 CSS

Dear bugtraq@, Ikonboard CSS bug via IMG tag was reported long time ago for 3.0.x. The only change in Ikonboard 3.1.1 at least on sending private messages is it checks URL extension to be .gif or .jpg, so IMGjavascript:alertdocument.cookie.gif/IMG still works perfectly.... Sorry if it was already...