Some days, everything comes up nuns, bunnies and idiots, even if you're Prince Charles.

"I feel a right idiot," said Charles, the prince of Wales, dressed in what workers at a British microchip factory have dubbed a "bunny suit." He was on a whistle-stop tour of high-technology factories in Wales and he had to don oversized boots and a space-suit-style uniform to watch production in a room said to be 100 times cleaner than a hospital.

But did "bunny" get confused with "nunnery" in all the excitement?

For whatever reason, Charles began talking about the other suited-up employes and said, "It is like a nunnery in there." But, ever gracious, Charles told his hosts after kicking the habit: "Having dressed up as a nun, I feel a little bit more refreshed."

Elliott Roosevelt, the 72-year-old son of Franklin Roosevelt, says his mother Eleanor was deeply hurt when she learned her husband was involved with another woman, and only forgave him when she saw the inscription on his gravestone.

Writing in tomorrow's issue of Parade magazine, Roosevelt says his mother was "shocked and humiliated" when she learned of her husband's affair with Lucy Mercer Rutherfurd. Friends and family had kept the affair a secret. She thought that it had ended 27 years before, when she threatened to file for divorce, but learned after the president's death that Rutherfurd was at Warm Springs, Ga., when he died.

Roosevelt says his mother's mood changed when she approached her husband's gravesite. "It came over her, as she looked at the inscription on that stone--just their two names together--that father had always loved and cared for her. He considered her his wife, not only in this world, but forever."

Frenzy at the Harvard Architecture Review!

We take you now to Cambridge, Mass., where the Review sponsored a design contest for a university gate at the corners of Quincy and Harvard streets. No one knows if it was minimalists rigging the vote, but the Review gave first prize to a sketch that showed no gate whatsoever. This was no mere oversight, because the winner, a visiting critic at Virginia Polytechnic Institute named Thomas Bartels, admitted from the start in his submission that he opposed using a gate to divide the university and the city.

If so, why did the Review notify Gary Black and Dan Sover, both students at VPI, that they were not only the winners, but the authors of the no-gate gate? Before rumors of a "Gategate" coverup could start circulating, Review spokesman Joanne Gaines stated: "The numbers got switched during the frenzy of the final hours."

Danny Kaye, who underwent quadruple-bypass heart surgery last week, has been moved from intensive care to a private room at Cedars-Sinai Medical Center in Los Angeles. Hospital spokeswoman Elizabeth Miller said the 70-year-old comedian was listed in fair condition Thursday, improved from serious, and that his five hours of surgery last Friday "went very well."

Umberto II, the last king of Italy who went into exile 37 years ago, may get his wish to return home. The presidential Qurinale Palace quoted Italian President Sandro Pertini as saying in a letter to Umberto's daughter Princess Beatrice, "I personally hope that the desire of your father to spend the last days of his life in Italy can be realized." Umberto, 78, has spent the last six months in a London clinic and was reportedly flown to Geneva yesterday for treatment of cancer.

Actress Jennifer O'Neill must stand trial on a weapons charge filed after she accidentally shot herself last October, a judge ruled yesterday. Westchester County Court Judge Carmine Marasco rejected the argument by O'Neill's attorney that the actress, as a celebrity, has a right to carry a gun to protect herself and her family from the "lunatic fringe."

In his ruling, Marasco refused to dismiss an indictment charging O'Neill with illegal possession of a weapon, an unlicensed .38-caliber revolver. O'Neill was charged with the misdemeanor weapons count after she shot herself in the abdomen Oct. 22 at her home in Bedford Hills. John Lederer, her husband and manager, is charged with criminal possession of a weapon, a felony.

O'Neill, 33, faces up to a year in jail if convicted. Lederer, 34, could be sentenced to as much as seven years' imprisonment if convicted.