Ok, so I've created a horizontal menu, went through the help file that tells me how to center it, which makes sense. But, when I actually use the code, it won't center as it is supposed to. I tried to create a simple horizontal menu with 1 root and to siblings.

I then went back and added the following to the CSS file (which is according to the help document)

.center {margin-left:auto; margin-right:auto;}

and the following in the HTML page just before the "ul" statement (yes there is a link to the external style sheet present).

<div class="center">

and
</div>
after the </ul> close statement

It appears that something is overriding it, but I can't quite figure out what it is. Any thoughts on what I should look for?

Take a look here... http://helpsite.sirage.com/stream.html

This may help you.

It would be easier to help you, if you included a link to the page in question.