If you've not yet figured out what

Some notes below your chosen depth have not been shown here

When you see the Some notes are ... phrase below a note, it means just what it says. You're only seeing part of the discussion, and there's more to be seen below the note. Clicking on the note's title (for example, Re: Re: Re: CGI::param wrapper for untainting above) will give you access to more of the discussion. You may need to do this several times to see the entire tree. I recommend practicing on this discussion. There's some good stuff buried here.