Like everyone else here I have upgraded to 2.8 and have come up against a very crutial flaw. The text box where you write your blog posts and pages seems to make the text white [invisible] but if I click in the box and select all, the text is there like it should be.
As you can imagine, this is a real problem as you cannot see what you are writing and where your writing it!
By default, I always disable the visual text editor because it's a pain in the butt but the 'invisible' text shows up if you do enable it in the admin options. I, and many others, do not want to use the visual editor so how do we get round this problem?