I have no idea why, over the last few versions, WordPress hasn’t been able to notify me of comments, etc, but I’m very glad I found this post:
How to fix WordPress when it doesn’t notify you of comments | MeAndMyDrum
Evidently just commenting out a line in a root file of WordPress will do the trick.
Andrew Hinton 
Thank you for mentioning my post.
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Great! This also helped me for my blog.
this is the coolest, thanks! Just what I was looking for.
Does anyone know a fix for this problem in wp 3.3.1?