A few readers have written in complaining they’re getting a strange message in their browser when they visit the site.
Turns out that some versions of Internet Explorer don’t like the way one of our Google videos is embedded.
Apparently it’s nothing to worry about (despite the sometimes stern message!) – I’ll see if I can sort it out shortly.
UPDATE: Should be sorted now. I’ve swapped out the Google video for a YouTube version of the same thing. Let us know if you’re still having problems.