Lots of users are moaning in support that they aren't getting comment notification emails anymore, but it used to work and they've not changed their address. I've just read about the sixth of them that I've seen, and it's looking like something really is broken.
The comment mailing code is simple enough that I don't think it's broken there, but I can't check anything else because I've got no access to the servers! Just a heads-up...
