I recently researched this.
Here's the link - directly from Google's mouth - that says there's no such thing as content penalty.
http://googlewebmastercentral.blogsp...t-penalty.html
I found myself researching it when I was looking into automated software and I found a software company completely lying about it. So frustrating when company's choose to lower themselves to try and get sales.
But this will clear it up.
Now relax, have fun writing, and submitting!
Have a great weekend everyone!