I'm also seeing this problem on my iPhone 4S (iOS 6). If I send a text msg to multiple people, one of the recipients always recieves a blank msg but if I send it to the recipient individually he'll recieve it. It's only him that gets the blank msg, he has a Droid OS as do other recipients. It doesn't matter if I send it to 2, 3, 4, or 5 people, if he's part of the group, he recieves a blank msg.
