[CentOS] Bug with cron ?

Fri Mar 20 11:16:12 UTC 2009
John Doe <jdmls at yahoo.com>

From: MOKRANI Rachid <Rachid.MOKRANI at ifp.fr>
> The following script works fine on all worksation when it's start manually or if 
> I run it line by line manually.
> If I would like to run it on crontab, the following line
>     "/usr/bin/yum -y install VMware-Player-2.5.1-126130.x86_64" 
> not install the new release of vmplayer with no errors.

Just tested the following:

  */5 * * * * yum -y install gnome-nettool >> /tmp/crontest 2>&1

and it worked fine...
Are you sure the script is executable by the crontab user?
Try the redirects like in my example to see what is going on