Thread:Sannse/@comment-4751914-20140216164356/@comment-8-20140218212035

The problem is that the Visual Editor (the newer one) can't cope with complex code. So if that's been used for a page, it won't allow you to use the tabs to switch modes. All the pages have "source mode", where you can see the code used, but a few complex pages will only use that mode

You can change that by simplifying the pages, but ones like the main page may need to be that complex to look good.

There's a new Visual Editor on the way, you can try it out by turning it on in Wikifeatures. I haven't tried it on main pages yet, but hopefully it will make more pages editable that way