LocalisationUpdate not working?

Another example: MediaWiki:Flaggedrevs-hidereviewed/hu has been translated two months ago, but it is still showing up in English (screenshot, link)

In FlaggedRevisions the file have moved location. This is why there is no synchronisation possible between the trunk branch and 1.18wmf1 at the moment. I would advise you to open a bug report for flagged revisions on that in bugzilla:.

We have bug open for this at bugzilla:33122. Problem still not resolved as of r107515 running on Wed Dec 28 23:54:10 UTC 2011 on Wikimedia.