Just to say, there are significant character set issues with this article, with ’ in place of apostrophes throughout.

I am having that problem as well. I think it may be something to do with the crash last night and possibly the Safari browser. I notified Super G, and he has notified Gaia Host.

The page claims "charset=utf-8" - but if I was guessing I'd suggest a unicode translation issue. It's not Safari since I'm using Firefox and in any case the three characters seem 'baked in' to the source.

A quick search and replace should solve it, if someone has appropriate access.

I got the problem fixed (unless I missed some). I also made a couple of the figures a little more legible.