@Duncanma:  No, that's the part that was really weird.  Both times I've been flagged were cases where I had written out a somewhat long-ish reply, but they were all link free.  In the most recent case I had cut and pasted some text from the the web, but I even pasted it into notepad first to remove the formatting and convert it to plaintext but it still got flagged.  In the end I just removed the reply/quote parts and it went right through.