Warp a DIV around img tags for styling

genesis-image-wrap.php

<?php
//do not copy above opening php tag when pasting into a functions.php file

//* Remove default post image
remove_action( 'genesis_entry_content', 'genesis_do_post_image', 8 );

//* Add wrapped post image
add_action( 'genesis_entry_content', 'dynamik_wrapped_featured_image', 8 );
function dynamik_wrapped_featured_image() {
    if ( is_singular() || ! genesis_get_option( 'content_archive_thumbnail' ) )
        return;

    if ( $image = genesis_get_image( array( 'format' => 'url', 'size' => genesis_get_option( 'image_size' ) ) ) ) {
        printf( '<div class="featured-image-wrap"><img src="%s" alt="%s" /></div>', $image, the_title_attribute( 'echo=0' ) );
    }
}