Just installed WordPress SEO, and it looks really useful. But I've had to disable it, because it removes the buttons on the visual editor.
When I go to a post to edit it, the visual editor buttons flash for a moment, then disappear.
When I disable the SEO plugin, I get them back immediately.
I've seen similar issues reported around the web, but the only fix I found seems to be out of date.
It's a pity. I'd like to use this plugin, but the visual editor is more essential.