How do I stop HTML entities in a custom meta box from being un-htmlentitied?

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If I’m allowed to answer my own question here: I found a way to stop the conversion of my html entities back to characters by using <?php esc_textarea( $text ) ?>, as detailed by the codex here: http://codex.wordpress.org/Function_Reference/esc_textarea.

Not sure if this is the right way of doing it, but its working. My (snipped) metabox code now looks like so: 

<?php 
  if ( $meta_box['type'] == "textarea" ) {
    $meta_box_value = esc_textarea( get_post_meta($post->ID, $meta_box['name'].'_value', true) );
    echo '<textarea class="meta-textarea" style="width: 100%;" cols="20" rows="2" name="' . $meta_box['name'] . '_value">' . $meta_box_value . '</textarea><br />';
  }
?>

This, combined with the single/double quote thing above, works fine now.

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