jquery 1.4.x, firefox 4 beta & ajax callbacks

jquery 1.4.x, firefox 4 beta & ajax callbacks

Hi,

I'm using firefox 4 beta 3, and I'm getting a strange behavior when using $.ajax : no callbacks are executed.

I made a very small and simple test html page, just loading jquery in an empty html page.
Than, using firebug's javascript console, I execute this :

$.ajax({url:window.location.href, dataType:'text', success:function() {alert('success');}, error:function() {alert('error');}});

Then I get no alert, but I can see in Firebug's console that the request was successful.

I tried this with jQuery 1.3.2, 1.4, 1.4.1 and 1.4.2
On 1.3.2, $.ajax callbacks works
on 1.4 and more, it doesn't

Ciao