With jQuery.get() and jQuery.post(), I cannot use the signature;

    jQuery.get('/foo', {
        // data
    }, 'json');

... instead, I have to specify a success handler as well;

    jQuery.get('/foo', {
        // data
    }, jQuery.noop, 'json');

This is because the code makes allowances for missing "data" param, but not for missing "success".

The documentation however, says that "success" is optional.