I don't recall any, but I'm sure they're there.
I remember Carroll's Chesthairs tried contacting MS with a sentence or two, but forgot to add a period at the end of one of the messages, so he just sent a lone period as a 3rd message, I then asked MS what he thought of CC and he told me that he recieved a message with just a period, and how miserably weirded out he was by it.