jquery does not have any effect on native prototypes. Please ask for help on the forums or in the #jquery irc channel.

It hangs on $.unique() when used like this $.unique($(document).add(window.top.document)) (it should get either iframe and its parent frame (when in iframe) or get just document when the current window is the top one). To be precise, it hangs that much, that IE8 displays "kill or wait" dialog, but if you wait, it will eventually complete. It worked just fine in 1.7.2 and below, but fails with 1.8.

This function only works on plain JavaScript arrays of DOM elements, and is chiefly used internally by jQuery. -- http://api.jquery.com/jQuery.unique/

1) You are passing it a jQuery object.

2) You are adding a document element.

Two things wrong with that so far, so I'll call this one invalid.

Ah, did not know that. I suspected this wasn't entirely right, but hey, it worked ;) Thanks for the explanation, dmethvin! It indeed is invalid for jQuery. Workaround for Reel is underway. Kelly, please follow me to https://github.com/pisi/Reel/issues/140

Actually, $.unique was not changed in 1.8. Also, $.fn.add does unique internally so the code is redundant.

Sorry, add won't call unique since documents don't have parentNodes and are treated as disconnected. Still, unique received no revisions in 1.8.

Actually, I am not arguing with you that $.unique() was changed at all. No way ;) I am just saying, that if you run the above code in jQuery 1.5, 1.6 or 1.7, it would work very fine very fast in IE8 and it will hang with jQuery 1.8. Then, the outcome is the very same. Just tooks way more time to perform...