[jQuery] Ajax error handling & textStatus

Good day,

When executing an ajax request, i've noticed the following problems :
- the textStatus callback parameter is always set to success ;
- the callback isn't triggered if a download error occurs (404 for
example).

I understand that the second problem might be unsolvable but is there
any way to get the textStatus to work properly or is it still being
worked on ?

Thanks for your help,

Cameron