Opinions, anyone? I am still inclined to land this to reduce the chances of global variables causing issues, but browsers do seem to contradict the W3C and bubble to window. So much for standards.

The standards changed :-( DOM Level 2 says events bubble to the document, DOM Level 3 says events bubble to the window. I emailed Doug Schepers to ask why this was changed, but never got a response.

I hate that I can comment anonymously now.

Well it comes in handy if I am thinking about shooting the messenger tho.

DOM Level 3 says events bubble to the window

OK, well then we shall follow the freshest available standard. :) The three linked tickets are still open and I'm looking at solutions for 1.7. Thanks for checking!

So when you have a window resize defined and a ui-resizable element the trigger on the element gets 'bubbled' to the window?

Okay, but then you need to update the documentation for the resize method to indicate that a window resize message can be triggered when the window doesn't actually resize! Ergo, that you should always check the target, e.g.

$(window).resize(function(e) {
  if (e.target == window)
    /* do your stuff here */;
});

Quite why a resize event on some non significant sub element should bubble up to the window is a mystery to me and it's confusing as hell to us mere mortals. It'd make more sense the other way around, when the window size changes notify all the children. Oh well.

Above comment does not work in IE8. This does work cross-browser:

$(window).resize(function(e) {
  if (!e.target.tagName) {
    // Window was resized.
  }
});