I ran across what I believe to be a bug that dates back all the way to 1.4.2 and still exists in the latest git. When I call $(input).click(), the delegate gets called as expected, but it happens before the input's checked value gets updated appropriately. This makes it a requirement to call $(input)[0].click() to get the proper order to occur and the delegates to work correctly should they need the checked value.

1. jsFiddle is of the problem: http://jsfiddle.net/xm6vv/

2. jsFiddle of how it should work: http://jsfiddle.net/GMZjB/