Sidebar widgets under Genesis child theme

On this listing detail page of my site the fontawesome icons appear to be broken on some browsers:

• IE 11: nothing displays at all where the icon should be
• Firefox 30.0 (Windows): I don’t even know how to describe what that is, so I’m attaching a screenshot.
• Mobile Safari: no problems
• Chrome for Windows: no problems

I’m using a Genesis Childtheme and all my plugins are up-to-date. I’m running the Genesis Theme Compatibility plugin. I’m also using this custom code in functions.php, but I already checked that it’s not the cause of the problem:

// remove the orginal action entirely
remove_action('geodir_detail_page_sidebar', 'geodir_detail_page_sidebar_content_sorting', 1);

// add a new action 
add_action('geodir_detail_page_sidebar', 'geodir_detail_page_sidebar_content_sorting_custom', 1);

// copy the orginal function, rename it and comment the code you wish to hide
function geodir_detail_page_sidebar_content_sorting_custom()
{
	$arr_detail_page_sidebar_content =
	apply_filters('geodir_detail_page_sidebar_content' , 
					array( 	//'geodir_share_this_button',
							//'geodir_detail_page_google_analytics',
							'geodir_edit_post_link',
							'geodir_detail_page_review_rating',
							'geodir_detail_page_more_info'
						) // end of array 
				); // end of apply filter
	if(!empty($arr_detail_page_sidebar_content))
	{
		foreach($arr_detail_page_sidebar_content as $content_function)
		{
			if(function_exists($content_function))
			{
				add_action('geodir_detail_page_sidebar' , $content_function);	
			}
		}
	}
}

As you can see from the screenshot, the Genesis Theme Compatability plugin has not given the divs with class ‘geodir-company_info’ in the sidebar the additional class ‘widget’. This means they are not displaying in the same way (white background, padding etc.) as other sidebar widgets (e.g. “My Dashboard” – see screenshot). How would I add “widget” to these divs?