"Some browsers (IE, Konqueror) have recently started supporting the non-standard properties 'scrollbar-shadow-color', 'scrollbar-track-color' and others. These properties are illegal: they are neither defined in any CSS specification nor are they marked as proprietary (by prefixing them with "-vendor-")"
(från w3.org,
http://www.w3.org/Style/Examples/007/scrollbars.html)