Sayontan who handles the Suffusion theme suggests this is a plugin issue.
He said this below which you can see in his forum for the theme.
Before I venture an answer is the plugin enabled for single posts at present? I ask because when I look at your page source I see the plugin code multiple times in the featured content section, but never in the main content. This would typically mean that the plugin failed to invoke for the single post itself, in which case it is a bug that needs to be resolved by the plugin author.
The order of markup creation is top to bottom. So your Widget Area below Header is created first, then your posts and then the widget area above footer. So maybe the script executes the first time it is found (in the header) and that causes a problem for the main post. The same doesn’t happen for the footer, where the script goes after being shown in the main content. Mind you, this is all guesswork – I have no clue how the plugin is built internally.
If you can fix this it would be great but if not i can live with having it only on the front page of the site.