I don't really like the way WIKI is designed, so I never look at it. Designed as in having to enter username and password. It bothers me so I'm not going to look at it. I looked at it before (don't remember when), but ran into this same thing and it bothered me so I just turned away. I looked at that "shader index" thread at the top of this forum and it seems so much that it's just a skin image that someone who's more talented in art than I am, accomplished.

Here's an analogy:

true newbie to computers : very frustrating to use them :: me to shaders : very confused about them

Hopefully you know what analogies are (no, you don't need to fill in the blank as from in school, it's already done).