Can we have someone who has the problem with the black spots in video playback post a link to a video that they were watchign when they saw the problem, and reference a time stamp for the rest of us to look at?

I just got an N9 used from Amazon and want to check for problems. I do notice the purple bars if I use that checkerboard image to fill up half of the screen in landscape, but don't notice them too much when doing browsing.. a little on the top in portrait mode where the search bar is, perhaps.

my buttons are a bit loose, too, but that's going off topic..