Even when Bush was asked about what he would do about North Korea, towards the end of the debate, he started going into his spiel about "Saddam was a threat". Here is the actual transcript of that part of the debate:
KERRY: "Now, I'd like to come back for a quick moment, if I can, to that issue about China and the talks. Because that's one of the most critical issues here: North Korea.
Just because the president says it can't be done, that you'd lose China, doesn't mean it can't be done. I mean, this is the president who said "There were weapons of mass destruction," said "Mission accomplished," said we could fight the war on the cheap -- none of which were true.
We could have bilateral talks with Kim Jong Il. And we can get those weapons at the same time as we get China. Because China has an interest in the outcome, too. "
LEHRER: "Thirty seconds, Mr. President."
BUSH: "You know my opinion on North Korea. I can't say it any more plainly."
LEHRER: "Well, but when he used the word 'truth' again ..."
BUSH: "Pardon me?"
LEHRER: "... talking about the truth of the matter. He used the word 'truth' again. Did that raise any hackles with you?"
BUSH: "Oh, I'm a pretty calm guy. I don't take it personally."
LEHRER: "OK. All right."
BUSH: "You know, we looked at the same intelligence and came to the same conclusion: that Saddam Hussein was a grave threat."
What the crap was THAT?

Bush had a massive Freudian slip, too:
Bush: "But to say that there's only one focus on the war on terror doesn't really understand the nature of the war on terror.
Of course we're after Saddam Hussein -- I mean bin Laden."
Kerry won this one, hands down. He even addressed the "flip-flopper" issue, by saying the following:
"I've had one position, one consistent position, that Saddam Hussein was a threat.
There was a right way to disarm him and a wrong way. And the president chose the wrong way."
All of these quotes have been taken verbatim from the CNN transcript available online, except that quote marks and boldface have been added by me for the purposes of the post. Yarr.