Whoa. Indeed, I see it too. I'll put that on the list, strange thing.
I can't be the only one seeing this, but it looks like the play button icon is getting clipped on the corners for some reason. Screenshot: http://dziey3.com/files/img/afterglow-button.jpg
The only way I have figured out to get rid of it is by increasing the font-size on .vjs-big-play-button:before to at least 170px, then the corners round out nicely again.
Should be fixed with 1.0.4, but that's only a quick fix. I'll push that to an issue.