If a text input is given focus through a .focus() call and then the value is changed and focus is lost, the .change() event does not fire. If user clicks the text input directly then everything works as expected.

http://jsfiddle.net/nuy2c/

to test click the button to give focus to the text box then make a change and see how the event does not fire. This is only a problem in IE, all other browsers work as far as i know.