I'm not sure if this is a bug or intentional... When I get the delivery failed notification the time next to the message disappears, as expected. Then when the message is finally delivered the time reappears with the time that I got the confirmation, again as expected. But if I leave the conversations screen and come back in between the delivery failed message and the delivery succeeded message the time next to the message reappears with the time I sent it. I was expecting it stay blank or change to some icon reminding me that I never received the delivery succeeded message.