I’m sorry if I’ve been away. This blog has an add-in (called Better WP Security) that occasionally takes it upon itself to trash an important configuration file (called .htaccess). And I hadn’t noticed that it had done it again. It looks as though it’s one of those add-ins that the author loses interest in. I’ll have to get rid of it.
[later] Apologies to Better WP Security, there was an update. The problem was with WordPress not showing all available plugin updates.