Strange cron behavior

[stan]

I'm having a hard time getting cron to run a task. I've run crontab -e
(as root), and added the following line:

12 * * * * /usr/local/bin/mirror_ubuntu

This script runs from teh command line. Now I've seen plenty of
strange beahviour because of the limited environment cron tasks
get, but a basic "echo "test" >> /tmp/stan isn't even creating
the file.

Sugestions?

-- 
Unix is very simple, but it takes a genius to understand the simplicity.
(Dennis Ritchie)