Reading about everyone having such great results with Panther and now 10.3.3, I decided to take the leap myself (I've been mainly a Quark 4 holdout). On my Ti 667 rev. b 30G with 512 MB of memory, running 9.2.2 and 10.1.5, I load the 10.3 CD (bought yesterday), click Restart on the first screen that comes up and then get the message, "An error occurred. Startup Disk was unable to select the install CD as the startup disk. (-01)." I have tried working around this by choosing the install CD from the Startup Disk control panel. The installer runs but near the end gives the message, "There were errors installing the software. Please try installing again." I reformatted the drive, loaded only 9.2.2 and got the same result. Any suggestions gratefully welcome. Thank you, David