This just in from Alternative Tentacles:

the music supervisor from American Idol has apologized for the show using the Dead Kennedys version of "Viva Las Vegas" in an American Idol episode a few months ago. Many loyal AT fans sent us word of this happening, and thanks to a couple of alert folks we were able to get copies of the broadcast to prove that they had broadcast the band's version of the song. (The television show had asked the band, including Jello, if they could use the song for a hefty sum of $, but were turned down by all of the members of the band)

Susan Slamer, music supervisor of the popular show, wasted no words in her email to the band and label:

I wish to express our sincere apology to the Dead Kennedys' and their fans for the inadvertent use of their version of the song "Viva Las Vegas" in American Idol, Season IV.