"Can't help thinking that whenever changes are made to the site, funny things happen."
Certainly makes me laugh.
It's not the changes we made, it's likely to be an advertiser who is displaying their ad on a "secure" page (https) rather than the current standard of http. This is confusing the browser a bit. We do try and stop them doing this, but it is trick when there's so many to rein in - it is a nuisance rather than a danger for the most part.
Anyway, thanks Ed. I'm not a technical genius, so thought I ought to say something about it. Yes, still getting it, but as long as it's not sinister I'm not bothered.