The Conan O'Brien, Jay Leno, Jeff Zucker poll we put up -- Who's the Bad Guy? -- has been hacked ... according to some people who work over at NBC.

There has indeed been a seismic shift over the last few hours. Here are the facts:



9:30 AM ET today -- Only 5% of users voted for Conan. Zucker was in the lead. Jay was second.

7:20 PM ET. A huge turnaround. Conan is the bad guy, with 40%. And, the number of people who have voted exploded in the last two hours -- it went from just over 200,000 to 547,000.

A cynical NBC source scoffs at the tampering allegation, telling TMZ, "NBC couldn't get it together fast enough to know how to do that."

We're checking to see if the poll has been hacked.

UPDATE: 8:42 PM ET THE POLL IS GOING CRAZY!!! With nearly a million votes, Zucker now leads with 49%. Jay is second with 26%. Conan has 25%.