Nothing particularly strange. Maybe someone else bought out it's new release availability for a while. Or maybe the Studio just hasn't got around to making it available on iTunes yet. While we Apple people might see iTunes as the center of the video universe, the broader world sees it as just one channel. And Apple apparently demands so much right off the top, it may not even be the highest priority channel for distribution. Patience and it may show up there eventually. Else, look around, someone else probably has it as a stream now (Amazon looks very likely).