Calling *NIX or bash gurus

If this post doesn’t make any sense to you, feel free to ignore it. I apologize in advance.

I’m having a problem using crontab to run shell scripts. As in, they don’t run and I get an error message (via email) as follows:

-bash: 0: command not found

I’m running Mac OS X 10.4.11 and it’s happening on two different computers with nearly-identical installations. One of the computers (the most important one, naturally) is across town so all I have is shell access via ssh.

I can provide more details as requested. Please help, won’t you? I’ll accept your free-as-in-speech solutions and offer you a free-as-in-beer reward!