Disable Sharedaddy in Feeds

The icons are added to the feed per filter in modules/sharedaddy/sharing-service.php:

add_filter( 'the_content', 'sharing_display', 19 );

sharing_display() does check for is_feed(), so there shouldn’t be a problem … seems to fail for no obvious reason.

You could add another check; something like this:

add_action( 'init', 'disable_sharedaddy_in_feed' );

function disable_sharedaddy_in_feed()
{
    is_feed() and add_filter( 'sharing_show', '__return_false' );
}