problem installing user crontabs

[Pollywog <pollywog@shadypond.com>]

I am trying to install a crontab (ordinary user) and although the
user is in /etc/cron.allow, I get this when I try to save the crontab.

crontab: installing new crontab
"/tmp/crontab.XXXXheKnVf":0: bad command
errors in crontab file, can't install.

I am using the 'crontab -e' ' command, btw, on Potato and my cron
version is  3.0pl1-57 

any ideas?

thanks

--
Andrew