I have the same problem. I’ve just spent TWO HOURS trying to delete files and reload files. Turn off plugins, delete plugins, reload plugins. Turn off visual editor, turn on visual editor. Check my java files. Delete cache, force refresh and look at my error console (which is just reporting a lot of declaration dropping – whatever that means?!?). I’ve read through all the previous posts and replies about this issue, and I still can’t get it to work.
I have finally gotten it to a stage where it sometimes briefly shows the icons before disappearing.
I have three other blogs all sitting on a WP client and I only have this problem with my main blog. I even copied the files from those blogs to my main blog and it still didn’t work.
This is really frustrating, especially when I was made to upgrade by my WP admin panel. I’m really starting to lose faith in WP, there seems to be so many outstanding issues with 2.7 nothing on them in the way of support. Yet there’s endless mention of how many things they want to do for 2.8. How about getting 2.7 to work?
Code may be poetry, but the ability to post is bliss!