If you have a subscription to a thread here on the forums and new replies to the thread are added by people, you get an email with a notification for the new posting.
The subject for that email always is ´topic reply´. I think that is a pretty general text and would love to see this change to something like:
Arduino forums - topic reply:
One advantage is that it is much more easy to browse to your email and find the email and thread subject you are looking for.