On the beta it doesn't asks anymore if you want to block a message or not, it directly blocks it. I think this behavior it's a bit dangerous. We could miss a click and block an important sender that accidentally felt on the junk folder and not get anymore messages from it. In fact I often receive junk emails with fake links but that contains the real domain that they are trying to fake in which case I can't really block these because I would also block the original emails (not sure how they do this but it's dangerous!).
Please bring back the message box that asks if you want to really block the sender of those emails displaying the email adress so we can identify clearly who it is. Thanks.