There is something funky in the diff caching. I was getting diffs that showed some version X as the latest version of the page, aka next diff link missing etc. It may be that I have viewed these diffs when that was actually the case, but those versions should not be shown anymore after that.
Version: 1.13.x
Severity: normal
URL: http://www.mediawiki.org/w/index.php?title=Localization_checks&diff=179522&oldid=179423