Yesterday, all of the saved messages to only one of my contacts disappeared and I was unable to view any messages he sent after that. I'm using the native Droid messsaging app and the thread still exists. When I try to open it, it takes me to a new message. I also cannot delete the thread. This is only happening with this contact and nothing else. I can read what's in the messages he's sending me through the ... "thread preview" (in the thread list when it shows part of the most recent message). I know he's getting my messages because he responds... I can't figure out why it would only be happening to ONE contact and how to fix it.