We've struggled with this one a little bit. The main problem is once you TAB into the text area, TAB is a perfectly valid character to be used when typing text. We can't prevent users from TABBing into the text area, because how else would a blind user get there to type in a new article. But at the same time, we can't just force a TAB while in the text area to move the user back out of that area, because TAB is something users sometimes want to use when typing text. So for the moment at least, what we've settled on is Shift-TAB. Shift-TAB will normally move you backwards in TAB order (whereas TAB takes you to the next field/button, Shift-TAB takes you to the previous one). When in the text area, you can get out with Shift-TAB, which takes you back to the top of the TAB order in this screen.