I upgraded both my Powerbook and my Powermac to Tiger w/ QT7. Now, neither of them will play content off of my Xserve streaming server. In addition to that, new content that I publish using Quicktime 7 and QT Publisher will not play on a Windows machine with QT6. My case has been filed with Apple, and they escalated it to engineers. Still, this SUCKS. This is a major bug. I was going to upgrade my Xserve to Tiger next week, but forget about it. I'll wait until I'm sure everything is going to work the way it should. In the meantime, I'm probably going to "downgrade" my two machines to Panther. Very disappointed, Apple.