Outgoing messages are coming up with the above message saying the page is not working with no indication that the messages were actually sent, but apparently they were sent because we got a reply.
I've been getting that every time I send a message lately. I just use the back arrow (undo) and go back to my mail or go to the home page.
Same here, and Ive been getting incoming messages 3-4 times I think because others are having the problem and multiple replying.
Yes, it's happening! After sending ... just go to your "Sent" mail and You will most likely find that it's been sent ... life is always a challenge, huh ~ Oh, how exciting 
It is still happening.