Today, Wordpress managed to make me cry: I realized that there were 100 comments stuck in the moderation queue and Wordpress had decided not to send me emails about that anymore. I didn't notice, because the comments of the people who most commonly give me feedback did show up on the page immediately, so I just thought I didn't get much feedback :(
I moderated all of them through now and I sincerely apologize to everybody who commented and never found their comment online. They weren't lost, just stuck in the queue.
I am going to fix the problem and promise to pay more attention next time! Thanks! :)
P.S.: As a positive side note: Everybody who I just moderated through will not have to wait for moderation the next time anymore, I think.