Is anybody else experiencing an issue with iMessage the last couple of days? I'm on AT&T, and when I send a message to another person that has iMessage, it will originally send and say "Not delivered" with the red exclamation point, and then immediately will send successfully. the only change that has been made to the phone is upgrade to 7.0.3. I have also updated my MacBook to Mavericks and enabled the iMessage on it as well. Could this have something to do with it? Thanks in advance for the assistance, I am totally perplexed by this.