User blog comment:Sarah Manley/New Editor Scheduled for Sitewide Release/@comment-188432-20110908232732/@comment-3388044-20110909021635

This last part is, and has always been, set by your preferences. If you do not want to be able to save (publish) without having left an edit summary (revision note), then go to Preferences, go to the Edit tab, at the bottom, tick Prompt me if I leave a blank edit summary.