Since I've upgraded to Mac OSX 10.7 Lion, I've noticed Pd-extended 0.42.5 seemed to crash on startup sometimes, while other times it was fine. It finally dawned on me that OSX is trying to load the previous "saved state" since I had CMD-Q'd Pd with windows open. It automatically opens those windows at start. I assume pd is not yet ready for these and crashes due to some init order issue ...
If anyone else has noticed this, a quick fix is to delete the save state so you can open Pd again. Then make sure to close all windows before quitting the next time ... thanks for the "help" apple.
http://osxdaily.com/2011/07/17/delete-specific-application-saved-states-from...
Commandline:
rm -rf ~/Library/Saved\ Application\ State/org.puredata.*
Dan Wilcox danomatika.com robotcowboy.com