As you probably already know, IMG 1.9 is starting to roll out. FiOS TV's Joe Ambeault posted release notes that may just answer quite a few of your questions. (And here's a link to the press release as well.)
I see that several of you have already started posting about IMG 1.9. Great! We'd love to have a central place to refer people, so we'll be moving IMG posts over to FiOS TV Technical Assistance. That way things are together and you won't have to search as much to find what you're looking for.
Please feel free to post here with your observations, feedback and questions. I'm sure others will chime in to help with questions if they've already run across the answers you're looking for. And it'll save duplicated efforts as well.