Comment on SEO AdSense WordPress Theme by Erik.
Now I’ve gotten it to work using the shortcode (a plugin called WP Adsense Insertion, you paste the code into an input box and just place a shortcode (eg, ) where you want it to appear) on the pages in question. If I do that, it appears as it should on the page.
But strangely the same exact ad code still doesn’t appear when directly pasted into the page/post via the WP dashboard. It just creates an empty horizontal bar (not the same shape as the ad is supposed to be). Weird.