tutorial security hint not working?

[eluser]gene292[/eluser]
CodeIgniter Home › User Guide Home › Installation Instructions
of the CodeIgniter User Guide Version 2.1.1 user guide.

I went through the static pages part of the tutorial fine.
However, when I tried to follow the security advice from Installation
Instructions:
"For the best security, both the system and any application folders should be placed above web root"
I get 404 error.
Can somebody else reproduce?

gene