Remove adverts.
Fix XHTML validity.
Separate div for adverts so they can be removed from small screen and print layouts.
Looks like it still pulls in the main css, so we'll need to ensure we override everything we want to change (not just remove it). This is on PIE, but shouldn't cause issues on other browsers.
First stab at CSS file for handhelds. Pretty much the same as the normal CSS file, except the left menu now appears below the body text (with the text shifted to the left edge) and some images have been removed.
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