It seems like everytime an OS update or upgrade comes out you can't use a previous version on the newer hardware. Case in point: we just bought 2 new G4 iBooks and when I went to install Jaguar on it, it wouldn't work. When I called AppleCare they eventually figured out that you can't install Jaguar on the new iBooks, ONLY Panther. I told them all of our software doesn't work on Panther and we haven't had time to test it all. His response was to upgrade our other software. Has anyone else run in to such issues with Apple and this forced upgrade scenario? It seems ridiculous for a new iteration and not a full version to lock out an OS that works fine on a Titanium. Not to mention, you could run OS 8, 9 and 10 on the same older G4's and suddenly iterative OS upgrades lockout each other. If this were a difference between OS 10.2 and say 12, I might see it but this is ridiculous.