jQuery UI Tabs beforeLoad does not send POST data

[aaronp55104]

I'm using jQuery 1.9 and jQuery UI 1.10.0. This does not work as expected:

$('.selector').tabs({
beforeLoad: function( event, ui ) {
ui.ajaxSettings.type = 'POST';
ui.ajaxSettings.data = 'one=one&two=two';
}
});

It seems to be related to ticket #8673, which is marked as wontfix. A workaround is posted in that ticket, but the workaround only works for GET types, not POST. A note should be added in the API documentation so others won't need to waste hours on this like I did.