I've seen a few related issues out there, but not this exact one. When I share a picture, and choose "messaging", I get the form to type in the contact to send it to. There doesn't seem to be a way to choose from my contacts list. When I type in the person's name, there's no autocomplete. If I type a partial name (e.g. "paula", assuming my girlfriend's name is "paula poundstone", it seems to accept it, but the MMS doesn't arrive on the other end.) If I type in the full name, it again seems to send, but doesn't capitalize of give any indication that it found the name in my contacts - and again, doesn't arrive.
Surely I'm missing something?