I have recently installed Tiger on my pb (G4, 1.5 GHz, 15"), and it will NOT get along with my Airport Extreme. I cannot use the wireless printing option (printer hooked up through USB to Airport). Whenever I try to select it, Word crashes. Also, if I try to set up any password, the airport admin will no longer be able to find the Airport, I will have to relog in and have the password set in keychain to be able to use the internet at all, and even then, iChat will refuse to log on (immediately goes back to offline if I try to log on). Everything I'm using (with the exception of Word), is an Apple product. What's the deal? I'm use to all of my programs and hardware working together perfectly, and feel like I'm stuck on a Windows computer (my Sidetrack has also cut out since installing Tiger, but I started a different thread about that).