I upgraded all my blogs over the past two weeks to 2.3.1. Since then I have received no notifications when someone leaves a comment on my posts.
Because it's happening on all my blogs and that it only happened after the upgrade, whatever I did, at least I was consistent. :)
I've read others here who have experienced the same problem, but evidently not with this particular version.
I received notifications before the upgrade.
Anyone have a clue as to what might be the problem?