Setting dialog height in IE8 does not work.

Setting dialog height in IE8 does not work.

I am unable to set the height of my dialog for IE8 (works fine in FF and Chrome). The height appears to always accommodate for the content.

$('.helpdiv').dialog({ autoOpen: false, height: 300, width: '50%', minHeight: 200, maxHeight: 300, minWidth: 100, maxWidth: 500, bgiframe: true, position: ['right','top']});
$('.helpboxlink').toggle(
         function (event) {
                        event.preventDefault();
                   $($(this).attr('href')).dialog('open'); 
                        },
            function (event) { 
                        event.preventDefault();
                        $($(this).attr('href')).dialog('close'); 
                        }
            );

A popular work-around I have seen is to set 'option', 'height', x on open ... while this correctly resets the height, I lose my scrollbars.

Any assistance on this would be most appreciated!