I've discovered two issues with 1.2.2b with the ready event:

For once, the event handler doesn't get a reference to jQuery anymore, instead only a (useless for me) event object is passed.

Test:

test("jQuery(function($) {})", function() {
	stop();
	jQuery(function($) {
		equals(jQuery, $, "ready doesn't provide an event object, instead it provides a reference to the jQuery function, see http://docs.jquery.com/Events/ready#fn");
		start();
	});
});

The above test fails due to another issue: Binding a ready event after the event was issued doesn't do anything anymore. In 1.2.1 the handler would be triggered immediately. Though this behaviour isn't documented anywhere, but changing it definitely breaks stuff, so we should be the docs, too. Eg. adding this to http://docs.jquery.com/Events/ready#fn:

<p>If the handler is bound after the event already fired, it is triggered immediately.</p>

No idea how to fix it due to the new special event handling. An introduction to that would be great.