原因是這張票:http://bugs.jquery.com/ticket/7341
底下有人寫到:
We are also stuck with 1.4.2 because of this checkSibling() IE problem. We have a page with 1.4.3+, UI 1.8.11, and a dialog with a large multiple select (hundreds of options). If you click on an option, IE 7/8 freezes in endless JS calls to checkSibling(). Please re-open, many users will be stuck with 1.4.2 until it is fixed.
底下有人寫到:
We are also stuck with 1.4.2 because of this checkSibling() IE problem. We have a page with 1.4.3+, UI 1.8.11, and a dialog with a large multiple select (hundreds of options). If you click on an option, IE 7/8 freezes in endless JS calls to checkSibling(). Please re-open, many users will be stuck with 1.4.2 until it is fixed.