It is weird. My iphone 4 can not download some episodes while others from the same series are just fine. Error message is the movie can not be played on this Iphone (though they are actually audio podcasts). These podcasts can be downloaded and played on my old 3GS and still can be played in PC Itune. For experiment, I syn those podcasts which can not be downloaded from PC itune to Iphone 4, guess what, now they can be played. I was wondering why Iphone 4 can not download and play some of the podcasts?