Last modified: 2009-09-24 10:17:36 UTC
If <br> or return characters are removed from a revision, then shows up in the diff instead. See: http://en.wikipedia.org/w/index.php?title=User:Penubag/Sandbox3&diff=315864106&oldid=315864082 http://en.wikipedia.org/w/index.php?title=User:Penubag/Sandbox3&diff=315863862&oldid=315863484
I guess it's not only for <br> but even when content is added. See this for example: http://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28technical%29&diff=prev&oldid=315865522
This is a bug in WikEd http://en.wikipedia.org/wiki/User_talk:Cacycle/wikEd#visible_nbsp_in_diffs