User blog comment:DaNASCAT/Technical Update: August 23, 2011/@comment-3569803-20110823191721/@comment-1474707-20110824101404

This isn't just comments, any time you browse a wiki when not logged in recent changes to pages are often not shown, apparently anon users access an older server cache to logged-in ones or something. But you can view the changes to pages by looking at the "diff" in recentchanges, however this is impossible with comments as they are all treated as new pages. Just one of my many problems with comments vs talkpages/forum