Board Thread:Support Requests - Getting Technical/@comment-4839035-20130225185813/@comment-168424-20130228005423

For future reference, to undo the most recent edit:
 * 1) Go to the page's history
 * 2) Click the time/date link before the most recent edit
 * 3) Click the Edit button
 * 4) Select all the contents and Copy (ctrl-C/cmd-C)
 * 5) Remove the &oldid=##### part of the URL, press Enter to edit the most recent version of the page
 * 6) Select all and Paste (ctrl-V/cmd-V)
 * 7) Click the Publish button

Also, if you're an admin or have Rollback rights, rollback will undo all the edits by the last user to make edits up to the last edit by a different user. So, it won't just undo the most recent edit, if the user has made multiple edits since a different user made a change.