Iran now admits that its nuclear program is in trouble, but insists that the Stuxnet worm has nothing to do with it.

Thousands of centrifuges (5,084 according to “a former top IAEA official”) have been shut down, but nobody can say why. The Iranians and the IAEA are totally flummoxed.

Only thing they’re certain of is it’s definitely, definitely, not Stuxnet that’s doing it, and so keeping Iran from becoming a nuclear power.

The Washington Post reports:

Iran’s nuclear program has experienced serious problems, including unexplained fluctuations in the performance of the thousands of centrifuges enriching uranium, leading to a rare but temporary shutdown, international inspectors are expected to reveal Tuesday.

The International Atomic Energy Agency, the U.N. unit that monitors nuclear programs, will provide no explanation of the problems. But speculation immediately centered on the Stuxnet worm, a computer virus that some researchers say appears to have been designed specifically to target Iran’s centrifuge machines so that they spin out of control.

Iran denies the worm caused any problems.

No country has claimed responsibility for developing the virus, although suspicion has focused primarily on Israel and the United States.

But what does it matter who’s responsible for it, since it’s causing no problems? No problems at all. Not to Iran, anyway. Absolutely not.