Do Overclocked CPUs Need a "Burn In" Period?

SinnopS asks: "I have been dealing with computers for a few years now, yet there is one thing that i can never find the correct answer too. And that question is wheather or not an overclocked CPU need to have "burn in" time. In my expirience, the Duron that I have was very unstabil for the first few days then worked perfectly. however, some people are saying buring in is not true and a thing of the past. Can some one shed some light on this subject for me?"