The line

<meta http-equiv="ImageToolbar" content="false" />

is not needed. See http://stackoverflow.com/a/7208381/721065. It was an IE6 thing.

Consider replacing the following in template.php

// Remove image toolbar in IE.
  $head_elements['ie_image_toolbar'] = array(
    '#type' => 'html_tag',
    '#tag' => 'meta',
    '#attributes' => array(
      'http-equiv' => 'ImageToolbar',
      'content' => 'false',
    ),
  );

with

// Use the latest (edge) version of IE's rendering engine
// or the Chrome rendering engine if available
$head_elements['meta_content'] = array(
    '#type' => 'html_tag',
    '#tag' => 'meta',
    '#attributes' => array(
      'http-equiv' => 'X-UA-Compatible',
      'content' => 'IE=edge,chrome=1'
    ),
  );

See http://stackoverflow.com/a/6771584/721065, http://stackoverflow.com/a/8942455/721065 and http://www.kycosoftware.com/blog/article/getting-foundation-5-to-work-in...

Comments

tisteegz’s picture

tisteegz commented

This is still an issue in 8. The Image Toolbar meta tag breaks validation. It should really be removed.

Validation error "Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”."

hongpong’s picture

hongpong commented

Good point tisteegz.

That code in 8.x is in zurb_foundation.theme - 

/**
 * Implements hook_page_attachments_alter
 *
 * Add custom meta tags to the header.
 */
function zurb_foundation_page_attachments_alter(&$page) {
  // Force IE to use Chrome Frame if installed.
  $page['#attached']['html_head'][] = array(array(
    '#type' => 'html_tag',
    '#tag' => 'meta',
    '#attributes' => array(
      'content' => 'ie=edge, chrome=1',
      'http-equiv' => 'x-ua-compatible',
    ),
  ), 'chrome_frame');

  // Remove image toolbar in IE.
  $page['#attached']['html_head'][] = array(array(
    '#type' => 'html_tag',
    '#tag' => 'meta',
    '#attributes' => array(
      'http-equiv' => 'ImageToolbar',
      'content' => 'false',
    ),
  ), 'ie_image_toolbar');
}

I think chrome_frame is okay but ie_image_toolbar should go.