I've noticed an interesting little bug since I upgraded to 4.2. Sometimes when I'm answering a text message where the keyboard is still hidden I will tap the screen on the text line to bring up the keyboard and it's just an empty space. I've attached a pic so you can see what I mean. It's not really a bother because I can back out to all messages and then tap the person I'm having a conversation with again and the keyboard will be present. I just thought it was an odd bug and was wondering if anyone else was experiencing this.