[Webkit-unassigned] [Bug 123326] Element with position:fixed moves when scrolling and is duplicated on the page each time scrolling is initiated

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123326





--- Comment #3 from Thomas Kahn <thomas at karnhuset.net>  2013-10-26 05:59:16 PST ---
If you want to attempt to reproduce the error, you might want to try it on this page:

http://www.morgannorman.com/backstage/

It's the page used in the supplied film.

I've looked over the HTML and CSS of the site and I can't see anything out of the ordinary. Yes, the site relies heavily on javascript for its rich interface, but it works just like it should in Chrome, Firefox and Internet Explorer. It also works in older versions of Safari - just not in Safari 7.

The reason I filed a bug report here was the very unusual behavior where an element gets duplicated over the screen when you scroll, like showed in the film. I haven't seen this kind of error caused by a faulty CSS or markup in all my years as a web developer. It looks a lot more like some form of browser rendering error?

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