It doesn't seem clear to the user just what changed on many lines of http://en.wikipedia.org/w/index.php?title=Allen_Swift&action=historysub… E.g., |-+----------------------------------------------------------+-+----------------------------------------------------------| |-|| ALTERNATIVE NAMES =                                     |+|| ALTERNATIVE NAMES =                                     | |-+----------------------------------------------------------+-+----------------------------------------------------------| |-|| SHORT DESCRIPTION =                                     |+|| SHORT DESCRIPTION =                                     | |-+----------------------------------------------------------+-+----------------------------------------------------------| Maybe it is removing or adding invisible characters or something. True I could use action=raw to see what was really in there, but to the average user it looks like one big head scratcher.