Update | 11:30 p.m.(NYT Arts blog) The boos poured out loudly and lustily after the Metropolitan Opera's gala opening night performance of Puccini's "Tosca" Monday night. The vocal thumbs down was not directed at the voices. Karita Mattila, who sang Tosca, and her tenor co-star, Marcelo Alvarez as Cavaradossi, received healthy ovations. So did James Levine, the Met's music director and the conductor that night.

But when Luc Bondy, the director, and his team took the stage for final bows, the boos arose. For scorecard keepers, the cheers and applause were louder, and many in the audience seemed to step up pro-Bondy shouting as the boos kept going.

Negative reaction was no surprise, given that Mr. Bondy's stark production replaced the lavish veteran "Tosca" of Franco Zeffirelli, a favorite of many Met fans. At a dinner afterward, Mr. Bondy seemed unperturbed by the reaction. "If people would be happy after 'Tosca,' then I would be upset," he said.

"Tosca"-philes will be interested in how the title character took her leap to the death in this version. A classic apocryphal tale has the soprano jumping off the walls of Castel Sant'Angelo onto a trampoline instead of a mattress and bouncing up a few times. This time, Ms. Mattila climbs up a stairs, disappears into the top of a tower and is seen in silhouette leaping forward. Stage devices arrest the jump so she is frozen in mid-leap. Quite effective.

Mr. Bondy injected a few risqué elements: the portrait of the Magdalene being painted by Cavaradossi in the Roman church of Sant'Andrea della Valle showed a naked breast, and at the end of the act, the evil Scarpia (George Gagnidze) displays his lecherous credentials by embracing a statue of the Madonna in the church, to the horror of the clerics on stage (the reaction of any clerics in the audience was unknown). Some reports held that Mr. Bondy had Scarpia, shall we say, asserting himself in a more vigorous fashion with the statue during rehearsal. Another lascivious note came in the opening of Act II, when three ladies of dubious virtue entwine themselves around Scarpia, with one appearing to simulate a sexual act while he sings. There's no aphrodisiac like power. As Tosca points out, "Before him, all Rome trembled." That comes, of course, after she stabs him to death, thus calming a tremulous Rome.

In the auditorium, the recession was not evident: the jewels and gowns and white ties and tails were abundant as ever. Along with the pop-culture celebrities, classical music honchos were out in force: Alan Gilbert, the New York Philharmonic's new music director; Clive Gillinson of Carnegie Hall, Ara Guzelimian, dean of the Juilliard School, Joseph V. Melillo of BAM and George R. Steel of the New York City Opera, among others.