My user account debacle had another side effect. Opening a project in Final Cut Pro produced error “this project is unreadable or may be too new for this version of Final Cut.”
A mild panic set in since I was running the latest version of Final Cut. Add to that none of my projects from the AutoSave Vault would open due to this error.
After some digging around I discovered what I’ll call a bug in FCP 6.02: absolute path references to files in a project. While absolute paths aren’t unusual it’s the fact they seemingly break your project when those files aren’t accessible. In my case I no longer had access to my old user account home folder but FCP was trying to access those files and couldn’t.
Instead of asking to reconnect the files (as is customary) it simply threw the nasty error. My quick fix was to chmod 770 my old home folder until I had everything moved over and renamed properly.
Apple’s FCP support group has more to add.