With the latest WordPress SEO by Yoast update, you can't edit the SEO Title for an article. Mr. Yoast, please return to the old way of populating that field.
With this update, the field is pre-populated with a greyed-out post title. When you put the cursor in there to edit it, you cannot select any of the text. So, you have to type or cut & paste manually. The other way was much better.
I find I often have to edit that field. Sometimes the title is too long, or, as it includes the site title, sometimes that has to be removed, if it's too long. I also like to edit it for other reasons.
Maybe you could give the option to use it the old way in the plugin's preferences?
Meanwhile, is there a way to change this that anyone is aware of?
Otherwise, great plugin!