Comment 13 for bug 1189850

I'm also getting this bug from time to time (it's gotten better with this #9 update though).
Screenshot is attached.

Before I even got this "jittery"-graphics-bug on websites, not only about:newtab. However until now i didn't get this behavior again.

Is my screenshot showing a result of this bug? Or do I have to open a new one?
Btw. Firefox seems to swap the images randomly? The YouTube-Preview is actually the same Preview as "heise" is using?! Is this a separate bug?