Yes noticed this bug last night. The navigation bar of the Add Contact View is hidden under the navigation controller of the message details. I was unable to click done or cancel.
Yep. This happened to me about five minutes ago. Tried adding a contact from messages and there was no "save" button. When I went back I got a gray screen and had to kill it from multitasking.
Strange that it didn't happen to me at all. I was able to add a new contact from messages just fine. Nothing was out of place. Did you guys setup your phones as new? Or upgrade from a previous beta?