Is there anything wrong with this line? $('#' + $(this).attr('id') + 'title').effect("highlight", {}, 5000).fadeIn(1000); It's being applied to a set of divs in cycles - the first time it shows them, and then as it keeps going round it highlights them again (as they are already shown.) Only, in IE7 and IE8 the highlight seems to stick on some elements randomly. Anyone know why this is?