From this:

The third and final debate between President Bush and Senator Kerry has been thrown into doubt after a state judge in Arizona ordered a hearing on whether the event, scheduled for Wednesday, should be halted because the Libertarian Party's nominee for president has not been invited.

Judge F. Pendleton Gaines III instructed the debate's hosts, Arizona State University and the Commission on Presidential Debates, to appear in his courtroom in Phoenix tomorrow [i.e., Tuesday 10/12] to respond to a lawsuit filed last week by the Libertarians.