Hello.  I'm have been testing an application with jQuery 1.4.2 and jQuery UI 1.8rc3. I've noticed that my callback functions while showing and/or hiding elements do not work unless I add the duration parameter.

I did not have this problem with jQuery 1.3.2 and jQuery UI 1.7.2

For example

1. // This does not work
2. $("#div").hide("explode", { pieces: 12 }, function() { $(this).remove() });

1. // This does work
2. $("#div").hide("explode", { pieces: 12 }, 400, function() { $(this).remove() });