I don't know if this belongs in the "Getting Started" board, since I've been working on wikis for over eight years, but I don't think it should be in "Getting Technical" either.
So anyway, I'm deleting spam pages and blank pages from the Transcripts Wiki. I refresh the category page whenever I delete a batch of these pages. Up until about a week ago, the deleted pages were automatically removed whenever I refreshed the page. Now, the deleted pages remain there even after refreshing. They don't go away until several hours later.
The deleted pages vanish in Special:Short Pages like they should, but not in category pages. Is there a new cache system in place that refreshes every twenty-four hours?