When in the editor on the MDC wiki, bullets don't render, which makes things somewhat confusing while editing bullet lists.
Created attachment 526591 [details] [diff] [review] Remove broken backgrounds and use normal bullets _content.css uses broken background images for lists in edit mode. The patch adds "disc" for simple lists and "circle" for nested lists. The file is here: http://viewvc.svn.mozilla.org/vc/projects/deki/trunk/mozilla/skins/mdn/Transitional/_content.css?view=markup
That was a holdover from an earlier design iteration, but the bullet urls weren't resolving in the editor. Sorry about that. Fixed in r87674