Here's an example. I have a subscription to about 12 podcasts. One of those is the Apple Keynotes podcast. I like to watch them as they appear, but I don't sync them to my iPhone. Right now I have my podcasts set to sync the 1 most recent episode of selected podcasts. Apple keynotes is not checked. I just got off the plane and I watched the keynote podcast on it. I'm back in the hotel, plug my phone in to sync, and I see a warning message on my phone that I need to delete some photos to make room for other things. Curiously, that 400MB of space that used to be free on my iPhone is taken. I figured it was probably the keynote as that's just over 400mb. Yup. It's on my phone, even though the box isn't checked. So then I go and I manually delete it from my phone by doing the finger swipe. Re-sync. iTunes wants to put it back on. I don't get it. What part about "unchecked box" does iTunes not get?