The big deal is he never told investigators of his independent inquiry to the CIA. The indictment alleges that Libby tried to lead investigators away from that.
Is it because he said he first heard it from a reporter? Or did he say he didn't talk about it publicly until he heard it from a reporter. If that is the conflict, whew.
It's that he tried to convince investigators that the only source of his "knowledge" was the reporter-fed rumor mill. So reads the indictment.