Over the last few weeks I’ve been installing the latest version of WordPress on clients’ websites and on a couple of them it has caused a problem. On the page/post editing box the icons for text options disappeared and the text box appeared to be empty – though when I highlighted it, all the text was there (albeit as HTML) but was white so it wasn’t normally visible. It was really frustrating because the only way I could edit page content was in the HTML view – not a major problem for me, but not something my clients wanted to do.
I spent ages trying to find a solution, and even went as far as rolling back to an earlier version of WordPress on one site. Finally, I found the solution – and it’s a pretty simple one. All I needed to do was install a plugin called Use Google Libraries. I still don’t understand what caused the problem or why this particular plugin fixes it – but fix it it indeed does. Hope that helps someone else!
UPDATE: It’s obvious from the comments I’ve received that this isn’t fixing the problem for everyone – sorry about that! Presumably it depends on the theme you’re using etc. I have had success with this on three websites now, but if I come across any other solutions I’ll update here.