In the new Chili Peppers video, ''Dani California,'' the group gleefully references bands like the Beatles, Parliament, and the Sex Pistols. Which is entertaining and all...until their nod to a sullen Kurt Cobain with a candle extinguishing before him suddenly puts a damper on the festivities. And we weren't the only ones who noticed. ''It was a big concern of [Chili Peppers bassist] Flea's,'' says the clip's director Tony Kaye (American History X) . ''Flea asked [ex-Nirvana drummer] Dave Grohl if it was okay. Dave said yeah—Nirvana was about having fun.'' We wouldn't call this homage ''fun,'' but it certainly did strike a chord.