I've been having this problem with my iPhone lately, not sure when exactly it started, but currently I'm running 4.3.1 jailbroken with pwnagetool. Every time I download a podcast from itunes, it will finish the download and disappear from the queue. When I open iPod, it doesn't appear in the podcast section and won't until I restart ipod.app. However, when I do that and it opens up, my entire library is gone. It's still there obviously because the space is being taken up, and the only way to fix it is to connect to itunes, at which point everything reappears. It's an easy fix, but gets really annoying, and makes the whole convenience of downloading podcasts when you're away from your home computer completely nonexistent. Does anyone know if there's a fix for this, or if it's a bug in iOS?