Windows XP SP3 with IE8 v8.0.6001.18702 and IETester v0.4
previous version: IETester v0.3.3
when i close a window(or tab) of a page that contains a window.onbeforeunload handler, the handler gets not called. With the previous version, i had installed it worked, as far as i can remember. If i refresh the page, the handler gets called, so i can test my pages that way. But it would be nice if the handler could be called again..