The audio just stops on the second slide of a presentation.
There are no builds or animations on the slide. When the audio
stops, the button on the control panel switchs to Play and if you
click it, you get a few more words of audio before it cuts off
again. The slide that follows has a Captivate .swf file on it.
One more thing... to rule out if it has to do with the
Captivate .swf file, try publishing with only the two slides and
see if you get the same behavior. If you get the same behavior,
then you can determine it has nothing to do with the Captivate