The only time I've gotten that error was if I chose custom install or a particular place to install the program during the install process, such as the applications folder, instead of accepting where it wanted to install and then moving it later. The process you used before is the same I've had to use for system 9, except that I have my hard drive partitioned into three parts with three different systems; Install the program under system 8.6 accepting all defaults - apply the patch, still under system 8.6; reboot into system 9 and then open the program. If I attempted to open the program under system 9 or did custom install before applying the patch, the above error would show up and I'd have to start all over again. I believe it has something to do with the patch installer itself, because I get this error also with another program's update: Adobe's Acrobat update from 4.0 to 4.05, while most other program's updaters, including Bryce and Poser, haven't had any such problems under any system. You probably already did this, but when/if the program starts acting up and crashing, just toss the preferences file in the RDS folder first to see if it clears up the problem, before trashing the whole program. Then, of course there are the ubiquitous third-party extensions that can cause problems and a few of Apple's as well, but I'll assume you ruled those out early on. Don't know if any of this has helped, but at least you know you're not the only one with this issue.