I have already reinstalled, and I have attempted to delete prefs and I'm still having the same issues. When I launch QT Player, I no longer get the Apple "Content Guide" showing what's new and available. In fact, when the movie does load, it often shows nothing but a brushed aluminum "window". I put window in quotes because it's like it never fully loads and there really is no window, because the whole thing is just a brushed aluminum background. It also would appear, based on looking at another Mac that is working, that the link for the content guide is different on my machine than on the other, but I could find nowhere to get into prefs or resources to adjust it.