Just a quick note to say that Blogger seem to be conducting random experiments on random blogs. Unfortunately this is affect this blog (in fact it seems to be affecting all my blogs). In this specific experiment Blogger have added support for their own clever image popup effect. Unfortunately this is interfering with the code I was already using for this. So now if you click on any photo on this blog you actually get two copies popping up one on top of the other.
It's being discussed as we speak so hopefully there should be a fix or work around soon, but until then sorry if it looks a bit of a mess. For once it's not my fault!
UPDATE: While Blogger haven't fixed this yet I have managed to figure out a work around so hopefully things are back to normal.