Glasnost apparently hasn't changed the Soviet Union enough for dissident Pavel Litvinov to visit. Litvinov, the human rights activist who led the Red Square demonstrations against the Soviet invasion of Czechoslovakia in 1968, is now a physics teacher at a private school in Tarrytown, N.Y., and he can't get a visa to go home to visit his elderly parents, Mikhail and Flora Litvinov. This at a time when many of his fellow dissidents are members of the Supreme Soviet. And his past activities have been written about recently in Soviet publications with praise for his defiance in the Soviet Union's darkest hours.

Litvinov's parents obtained official permission last March for him to come home for a visit. But Litvinov has been here at the embassy and has spent hours on the telephone with Soviet officials only to be told he cannot get the visa and there were "no official explanations" why. Out and About

Some late notes on the Fourth of July celebrations: The cast of "Les Miserables" arrived in town just before Independence Day and wanted to know where they could go to watch the fireworks -- after all, many of them were portraying French revolutionaries in the musical. Someone suggested the Hotel Washington, a location that often is booked years in advance. Then National Theatre spokeswoman Alma Viator called the White House, aware that the South Lawn is open each July Fourth to the White House staff and their families, and the cast and crew were invited to join them. Before the fireworks, some 100 members of the show's cast and crew sang for their supper by performing the national anthem, and the Marine Corps Band returned the favor with some numbers from "Les Miz" ... Georgette Mosbacher does know how to get attention. She showed up at Alan Greenspan's Independence Day party at the Federal Reserve in a sexy green outfit. But what caused a few raised eyebrows was that the wife of the secretary of commerce was wearing an American flag scarf around her shoulders. There were more than a couple of comments as to whether that was a proper or respectful thing to do. Well, at least she wasn't lighting matches threateningly, or wearing it on the seat of her pants ...

In one of the early scenes of the thriller "Die Hard 2," actor Bruce Willis rushes to a public phone at Dulles Airport here. Newsweek magazine has noticed that the telephone company logo reads "Pacific Bell." There are, of course, no Pacific Bell telephones at Dulles; that company operates only in California. It's amazing how it cost $62 million to make "Die Hard 2" and such an obvious mistake escaped everyone's notice ...

You have to give it to comic Henny Youngman -- he has a way of having the last word. When he heard that Imelda Marcos was cleared of fraud charges, he said, "Imelda's so happy that she's going to Israel to plant a tree -- a shoe tree" ...