SUPERSEEDED, PLEASE SEE Trilobita WordPress Theme
Here’s a theme for WordPress. It is based on the Jello layout technique. This means that you get a fluid layout, but one that has a minimum and maximum width set. Yep your site will not go below a certain width or expand beyond your max width. Try it, the default setting is that this layout will not go below 700px or above 1000px. These values can be edited to suit your needs, as can the amount of fluidity.
The theme is also XHTML 1.0 transitional compliant and complies with the WAI AA standards and it’s widget friendly 
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Let me know what you think.
There’s a default install showing what you get ‘out of the box’ at http://www.trilobita.co.uk/wordpress/
you can get the files below:-
