IE bug in javascript/required_input/required.js
 

line 7 var class = $(this).attr('class');

class is a reserved word for I f'n E so we have to change line 7 to

Code:
var tabClass = $(this).attr('class');
and line 9 to

Code:
if (tabClass == 'input-required' && $(this).val() == '') {
I was working on a fixed facebook style mini admin menu when i stumbled across this. I think i recall this happening a couple of years ago too.