I'm having a very odd problem. In my WordPress install certain posts are being automatically deleted at 5:30 p.m. I haven't discerned any pattern as to which posts are being deleted or what days this happens on, but I can't figure out why they're being deleted at all. I hooked into delete_post to see which user was doing it, but it comes back with an empty user (ID of 0).
It seems like it's some kind of wayward cron, but I don't have any running. Does anyone have any ideas?