This is just a bit of paranoia that I have. I like the "library" approach that many OSX apps take, such as iPhoto, Aperture, and Devonthink for examples. I now have thousands of irreplaceable photos and documents stored in those libraries. I keep a Time Machine backup of them and also back them up to CrashPlan online. Therefore, I SHOULD be really safe, right? But what if the "disaster" is not a drive failure or a fire or a flood? What if the library just goes corrupt? What if I don't realize it until I've actually backed up the corruption? Should I be exporting everything from these libraries and backing up the individual files, as well, or do figure I will always be able to put back some backup version of the library file and it will open without problems? It would be a horrendous pain to have to back them up individually, too, but would be a necessity if the library file was corrupt and wouldn't open. Just interested in others thoughts on this.