You have a very interesting setup with this site.

Did you do this or did someone set it up for you.

Don't want to step on any toes but, it looks like the work of someone who wanted to code php versus work the admin settings and css calls.

You have weird things showing up everywhere. Right now your site is set for:
body {
color:#000000;
font-family:verdana,arial,helvetica,sans-serif;
font-size:62.5%;
}
That's the standard for Zen. putting styles in text as you enter it creates the 150-line main page that we dropped into 36 lines of code.
Before, the main page had three different ways of defining <h2> When (not if) they needed changing, you would not be able to change one call in the stylesheet but would have to search every file holding an <h2> to see if it needed changing.

Note that, even with the font defaulting to verdana, some folks will have other fonts set as default or simply not have verdana installed on their computer. (yes, lurkers, I know it's standard font but I have a friend who goes through every computer he touches and deletes fonts he doesn't like)

and, I'm afraid, the really bad news is that most of this will go away with your settings at the next upgrade because everything is still being done in the classic directory.

sorry that this doesn't help much,