Hm, dangerous back button. I liked the fact it served as an undo, but I wanted to navigate back here to say so, and had to click though a whole minute of edits.

Hm, dangerous back button. I liked the fact it served as an undo, but I wanted to navigate back here to say so, and had to click though a whole minute of edits. I would suggest not breaking the default functionality, back buttons should go back. Instead add an undo/history/revision button.