CNN involved in a coverup?

Clear differences between Bush's speech and CNN's published transcript

Today CNN published a transcript of pResident Bush's North Korea speech. The transcript shows Bush repeatedly saying "nuclear" while anyone who listened to the speech clearly heard him say "nucular" in every such instance.

Human error, or politically-motivated coverup? CNN is constantly derided by conservatives and arch-conservatives alike as a "liberally-biased" media outlet. I think they are actually in the conservative camp, otherwise why would they falsify his words to make him look smarter than he really is?