selector issues with Jquery 1.3.2 and Firfox 3.5.3

selector issues with Jquery 1.3.2 and Firfox 3.5.3

Hi,
this selector does not work with Jquery 1.3.2 and Firfox 3.5.3

$("li a").click(function()
{
alert('test');
});
Using version 1.2.6 it works with out issues. Older versions of FIrefox work with no issue and the same with IE it works!