Akismet was the culprit for me. My test topics were called “Test 1,” “Test 2” etc and I guess it didn’t like that. I disabled the “Allow Akismet to actively prevent forum spam” option and Voila, notifications returned. Strangely, the topics still posted. Seems Akismet just keboshed the notifications. I also tested the subforum notifications and they worked also. I’ll post more if I find that other factors exist, but for right now looks like it works.
