Global ajax events: ( are being removed )

    Events such as ajaxStart fired by $.ajax 
    can currently be attached to any element–even
    to elements that are not in a document at all!
    This creates an inefficient special case, 
    so we will eventually remove that ability 
    and fire ajax events only on document.

I need to look into this. If you are using jQuery outside of a standard browser environment this might be problematic.