The page Recentchangeslinked still uses the old system message "showhideminor",
replaced in Bug #5409. (My patch included a replacement for that, but unluckily,
it wasn't fully implemented.) You should replace it with the new "rcshowhideX"
Please fix it in both REL1_6 and MAIN, because we need this fix both in the
minor releases of 1.6 (1.6.1, etc.) and in the future releases (1.7 in June (?)).