I hope that we can get this sorted cause I am really looking forward to using this software. I too have been having the same issues as everyone else starting with "Invalid or corupt jar file" which I resolved by opening the terminal file with textedit and corrected the path (for me its applications/avocado/avocado.jar). Next I got the swt-carbon error too. So found the jar it was...
2009-10-18 14:48:37 UTC in avoCADo-CAD