A 30-year-old man and a 21-year-old Hawaii Kai woman were arrested by police on suspicion of criminal property damage shortly after 8 a.m. Saturday, then released pending investigation, after they allegedly kicked in an etched glass panel door at Iolani Palace.  The couple entered the palace's Great Hall, but fled when the alarms sounded and were caught by three palace guards.  Kippen de Alba Chu, the palace's executive director, says the damage to the etched glass is "irreparable." The glass, which depicts the image of a Hawaiian woman, was ordered in England and etched in San Francisco in time for the opening of the palace in 1882. The palace was built by King David Kala­kaua as the official residence of the Hawaiian monarchy and is a designated National Historic Landmark.