I was working in a project and did a render overnight. It came out beautifully, crisp quality, everything I was expecting. I made a few tweaks to certain sections, exported those sections out on their own (e.g. 03:00 -> 10:00 of a 20 second comp). I brought all these into Premiere Pro CS3 to assemble the initial output with my fixed outputs. I rendered, but now I find the new outputs I made are of lower quality than my initial output! It looks a bit soft, lines are blurry to has less quality/definition to it. Any ideas what's going on?