I was downloading an HD video from iTunes, and it was a pretty hefty file and it said it would take 20 minutes to download. I sat and watched it for about five minutes but got bored so I left the computer and did something else. I came back ten minutes later to check on it and my computer had fallen asleep. When I woke it up it said "zero KB of 737.3 MB - stopped". Then it started downloading it from the beginning again.
I don't understand why iTunes can't pause the download and pick it up where it left off...