So I stated this in another post but I'm not receiving any notification email when people reply to a post in which thread I checked the "please notify" box.
Why am I not receiving anything?
I seem to be having the same problem.. (just throwing that out there)
Really sorry that it took me so long to fix this. Was a really nasty combination of bbpress and my smtp host.
I fixed the issue yesterday with the new root server powering the website.
Confirmation for this fix would be you receiving a email notification about this reply ;-)