Juan, i thought that you were going to touch all the PI swp files in /tmp periodically to avoid OSX's /tmp garbage collection from destroying all the swp files?
i got a new macbook and true to form i've left PI 1.8RC7 running for days on one of the desktops. thankfully i had saved my project before i let it go idle, but due to OCD issues i just tried to save the project again and found that all the swp files were indeed gone. i had forgotten to hack the cron script to increase the amount of time files can be idle before they are deleted...
rob