ikiwiki.info has upgraded to the not yet released ikiwiki 2.30. This version of ikiwiki drops support for subscribing to commit mail notifications for pages. The idea is that you can subscribe to the new RecentChanges feed instead. (Or create your own custom feed of only the changes you're interested in, and subscribe to that.)
So if you were subscribed to mail notifications on here, you'll need to change how you keep track of changes. Please let me know if there are any missing features in the RecentChanges feeds.
Statically building the RecentChanges also has performance implications, I'll keep an eye on server speed..