Hi Chris, it seems there is a nasty bug with first time activation of articles, see the discussion under the thread above: "Please could you support me to make download working? [modified]". I added an answer to that thread too to make it clear what happened in my case. The effect of this bug is that newly created articles don't have working downloads, and the images are also not working. Not nice when you get negative remarks and points about something you have no control over..
I think this bug also causes the problem described in this thread "How to get code to show under 'Browse Code' tab" where I'm now answering. Because when there's no downloads, it's logical that the "browse code" tab isn't working either.
We've taken further steps to ensure this issue is resolved. We've tested the daylights out of this and cannot get it to fail in our dev or live environment, yet occasionally there are issues. It's incredibly frustrating, but we think the latest fix should sort it out.
Slight confusion on discussing the article with a mentor, the FAQ says 'After volunteering, a Mentor leaves a comment on author's article to offer assistance'.
I wanted to add a thought I'd had on a potential improvement as a comment but can't see how to do that, I wanted to do it this way rather than simply editing the article since then it's harder to see which of the two options, original or potential revision, provide a 'better read'.