Garrison Keillor, Meryl Streep, and Lindsay Lohan in A Prairie Home CompanionA PRAIRIE HOME COMPANION

One of the many glories of Robert Altman is that he never pretends to know everything there is to know about the characters in his movies, and doesn't expect his audiences to, either. In an Altman film, you may think you have someone all figured out, until a later scene proves that you haven't begun to understand what makes them tick; Altman is fascinated with the dichotomy between characters' public and private faces. (It makes perfect sense that he eventually filmed a murder mystery.) It sometimes seems that there's not much going on in an Altman movie, and audiences could easily assume the same about the director's latest, A Prairie Home Companion. But if you're as enthralled with character as the director is, and with the drama of actors gradually revealing character, his ambling, "plotless" films can be sheer bliss.

Anna Faris and Drew Mikusa in Scary Movie 3SCARY MOVIE 3

With Scary Movie 3, the assignment of directing has been passed from Keenen Ivory Wayans to Airplane!'s David Zucker, which is a big step forward right there. (Zucker isn't much of a director, either, but at least he has ideas on how to shape a scene, and is actually pretty adept at making his film parodies look like the films they're parodying.) Plus, any time Zucker and company are satirizing the outrageous pomposity of M. Night Shymalan, whose Signs receives - and deserves - particularly harsh treatment here, Scary Movie 3 is everything you want a movie spoof to be: smart, funny, and more than a little mean. (And heartening - until now, I thought I was the only one who detested Shymalan's "Hitchcockian" appearance as the vet who accidentally kills Mel Gibson's wife in Signs.) The wide-eyed, appealing Anna Faris returns as the lead, ably satirizing Naomi Watts' reporter from The Ring, and comic actors such as Charlie Sheen, Jeremy Piven, Queen Latifah, Camryn Manheim, and legendary spoofster Leslie Nielsen all score some laughs. So why is Scary Movie 3 still so disappointing?