I love the use of the postDispatch hook! How is this providing support for IE6 though?

In IE6 this will not work –
[iframe doc].onbeforeunload = [ some function ]

but this will –
[iframe doc].attachEvent( "onbeforeunload", [ some function ] );

In this test, i wanted to check if user function attached through window object will not clobber jQuery beforeunload event, but i can't do that in IE6.

@Orkel, looks like a legit failure in Safari 5.0? I was able to reproduce on BrowserStack. Perhaps Safari 5.0 requires window.onbeforeunload? http://swarm.jquery.org/result/359338

If we can fix Safari 5.0, we probably should, but it's not on the supported browser list. We should really update TestSwarm.

There must be some mobile devices on Safari 5.0 still? If not, great, Or if it's a small number we could document that this one thing doesn't work on them.

Beforeunload event does not work on iframes in IE6 if event handler was defined through window object, but it will work, if this event was binded though attachEvent.

In old Safari this event will not work on iframes regardless how it was binded, but it will work on parent window. So this test will fail with new or with old code in old Safari.

How want to do this? I could replace this test on synthetic one or leave it be?

Okay, so this only affects iframes, and only in Safari 5.0. We just need to avoid getting a unit test failure, can you do a patch for that?

there you go – #1002