http://dev.jquery.com/ticket/1572 is not closed.

Demostrated code is internal to jquery's event processing pipeline.I'm talking about

$(function(){})

construct,before it's called fix() function already run,but body is not always available at the time.If I put script including instruction in "body",all works as expected,but in "head" section you can observe such anomaly quite easily-just reload several times page of moderate complexity and you'll see random "Object required" sparks.I'm using IE7 on vista,but IE6 has similar problem.This error not sacrifice Jquery's functionality,but it's very annoying by nature if "Script debugging" is enabled.

simple fix can be (b&&):

event.pageX = event.clientX + (e && e.scrollLeft || b&&
b.scrollLeft || 0);
...
event.pageY = event.clientY + (e && e.scrollTop || b&&
b.scrollTop || 0);

Thanks.