The iTunes store lists the run time for "Neutopia" as 21 minutes, 39 seconds, so the episode may have been cut. It did have some risque humor; I'm not an expert on Australia's censoring practices, but that might have affected the run time.
On an unrelated note: Welcome to PEEL! Enjoy your stay here. Be aware that this thread will probably be closed. In the future, questions like this would probably best be put in the Futurama News thread
, or even the episode thread
for "Neutopia." No harm done, though. Stick around long enough, and you'll get the hang of things. Edited, because I thought 20 minutes and 21 minutes were the same thing.