Comment 2 for bug 369234

Found the actual culprit. The built egg creates a link in /usr/bin/sendoff.

That file:
#!/us/bin/python
# EASY-INSTALL-ENTRY-SCRIPT: 'sendoff==0.0.8','console_scripts','sendoff'
__requires__ = 'sendoff==0.0.8'
import sys
from pkg_resources import load_entry_point

sys.exit(
   load_entry_point('sendoff==0.0.8', 'console_scripts', 'sendoff')()
)

Updating the python link to be python 2.5 specifically should fix the command line call and find the application.