Gareth, here's an odd one. Tonight, I was experimenting with 2.7+More+Collapsed Topics on my Samsung Tab 2 (Android), just to see how things were looking. What I noticed was that the icons to hide/show/highlight a topic were missing. In my picture, this is how they look from my Mac, in Safari. Yep, they are there. But on the Samsung Tab 2, the icons are missing, so I cannot show/hide or highlight a topic.
I tried Firefox for the Android, thinking it might be a browser problem, no luck.
I switched the course format from Collapsed Topics to Topics, and the icons do show. So it seems to be something with Collapsed Topics.
I also tried removing all custom CSS, and this did not fix the problem.
Your thoughts? If you can't get a Samsung tablet or equivalent, we might need someone else to verify this.
(I cannot figure out how to take a screen shot from my Tab2. I have the latest Android OS, and I can't find where they put the once easy to click on screenshot button. Sorry.)