They aren't booing, they're just saying "Dave"

Just fired up Letterman from last week while I do some stuff. They're doing a bit with a bunch of sight gags like "Celebrity Pool Water" and "Ben & Jerrr's Backyard BBQ ice cream." He got to an poorly executed, lame "contact lens sunglass thingy" and after the lukewarm audience reception they cut to tape of Kevin Eubanks, Jay Leno's bandleader, laughing and rocking in place.

Some nights The Late Show reminds you of how good they can be.