Lets Start a iMessage bug list LOL
1) Inconstant use of Caller ID. One minute it uses @me.com and the next it uses the other email address
2) All iDevices don't keep up to speed with messages
3) Reading message on one iDevice doesn't clear the alert, badges or missed event in the notification centre of the other iDevice
4) Sometimes when sending message in iPad the message is sent but the blue bubble gets stuck where you type the message. Only way to resolve is click off or exit (not force close) and reopen.
5) Can't add people to current conversation.
6) [macingham] Symbol saying other person is typing comes up for like half a second for no reason (they aren't typing). Noticed this when testing face to face with a friend.
7) Message will state 'delivered' but then quickly shows failure with resend option.
8) [ChazUK] If you start typing a reply, then take a pic to add to the message the text window disappears. To get it back i had to pop out and back in to the message.