You talking about on-site alerts or email notices?
When someone responds to one of my threads, I think I see a red bell? And when someone PM's me, I think I get a red envelope?
I usually see those, but there have been several times already when I didn't get those icon notice that someone responded to a thread.
And I was away yesterday, and only had one response to a thread, so it isn't like there is some cutoff if you get 50 replies.
(I usually just log in and rely on the notices in the menu - haven't logged into email in a while.)
Sorry for complaining, but it's always annoying when indicators don't work properly.
I don't think I'm doing anything wrong.