I recently had two 15" 867 Titanium Powerbooks brought into the store that needed an Tiger upgrade. In both cases, on installation, the installer errored. The Powerbooks both took 10.3.9 just fine. I tried just about everything I could think of. I tried installing with another disk, installing all the updates for 10.3.9, and doing an installation without all the fonts and printer drivers. The funny thing is an Apple System Engineer came in yesterday who happened to have the same Powerbook and was running Tiger. He said there shouldn't be any reason the Powerbooks won't install. Any help is greatly appreciated.