<td>, <th>, <p>, <li> (Customized in this Style)
 

I want to change all the fonts except those located here:

<!-- message -->
<div id="post_message_141">I like that font -- the one above showing the titles</div>
<!-- / message -->

ie within a post/message.

If I change it in Extra CSS Attributes under <td>, <th>, <p>, <li> (Customized in this Style) to only one font family everything changes including the messages/post.

Any help will be greatly appreciated.

Unless it's a global call, you can override the CSS settings within the <div> or even <span> tags. Since the <div> in your example has an ID you can add a class attribute such as:

And place the CSS in Main CSS "Additional CSS Definitions" as:

Or

See if that works.

(This auto edit double post thing sucks so I deleted what was previously written so what help I now need is not lost in the jungle...)

Ok so I have the following in CSS definitions:

.smallfont
{
font-family: comic sans ms;
}

And this affects:
Now with this:

I want to have "testing" not be limited to just comic sans ms so I wrote:

.clear:both
{
font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif;
}

That did not work (you already know that).

Idea to do what I want to accomplish?