Reported on commons vp.
Query pages that use categorylinks table, like Special:Wantedcategoried, Special:Mostcategories, etc seem to have stopped updating on about nov 1.
On most wikis they are supposed to run every 3 days.
Maybe there is some sort of long-query-killer for categorylinks tables thats now acting against special page updates(?)
Timing is close to 26ca62ef3e, but maybe that's just a coincidence.