diff --git a/core/modules/file/file.install b/core/modules/file/file.install
index 49fc458b428b7619ce1ff469d5638f02d22c972c..170075c2228a8c4bddd0fa074a2a35e3f87776fd 100644
--- a/core/modules/file/file.install
+++ b/core/modules/file/file.install
@@ -67,18 +67,18 @@ function file_requirements($phase) {
     }
     elseif (!$implementation && extension_loaded('apc')) {
       $value = t('Not enabled');
-      $description = t('Your server is capable of displaying file upload progress through APC, but it is not enabled. Add <code>apc.rfc1867 = 1</code> to your php.ini configuration. Alternatively, it is recommended to use <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress</a>, which supports more than one simultaneous upload.');
+      $description = t('Your server is capable of displaying file upload progress through APC, but it is not enabled. Add <code>apc.rfc1867 = 1</code> to your php.ini configuration. Alternatively, it is recommended to use <a href="@url">PECL uploadprogress</a>, which supports more than one simultaneous upload.', array('@url' => 'http://pecl.php.net/package/uploadprogress'));
     }
     elseif (!$implementation) {
       $value = t('Not enabled');
-      $description = t('Your server is capable of displaying file upload progress, but does not have the required libraries. It is recommended to install the <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress library</a> (preferred) or to install <a href="http://php.net/apc">APC</a>.');
+      $description = t('Your server is capable of displaying file upload progress, but does not have the required libraries. It is recommended to install the <a href="@uploadprogress_url">PECL uploadprogress library</a> (preferred) or to install <a href="@apc_url">APC</a>.', array('@uploadprogress_url' => 'http://pecl.php.net/package/uploadprogress', '@apc_url' => 'http://php.net/apc'));
     }
     elseif ($implementation == 'apc') {
-      $value = t('Enabled (<a href="http://php.net/manual/apc.configuration.php#ini.apc.rfc1867">APC RFC1867</a>)');
-      $description = t('Your server is capable of displaying file upload progress using APC RFC1867. Note that only one upload at a time is supported. It is recommended to use the <a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress library</a> if possible.');
+      $value = t('Enabled (<a href="@url">APC RFC1867</a>)', array('@url' => 'http://php.net/manual/apc.configuration.php#ini.apc.rfc1867'));
+      $description = t('Your server is capable of displaying file upload progress using APC RFC1867. Note that only one upload at a time is supported. It is recommended to use the <a href="@url">PECL uploadprogress library</a> if possible.', array('@url' => 'http://pecl.php.net/package/uploadprogress'));
     }
     elseif ($implementation == 'uploadprogress') {
-      $value = t('Enabled (<a href="http://pecl.php.net/package/uploadprogress">PECL uploadprogress</a>)');
+      $value = t('Enabled (<a href="@url">PECL uploadprogress</a>)', array('@url' => 'http://pecl.php.net/package/uploadprogress'));
     }
     $requirements['file_progress'] = array(
       'title' => t('Upload progress'),
diff --git a/core/modules/image/image.field.inc b/core/modules/image/image.field.inc
index e6dfafa8e4a87ac0ecc6ff5493bdfa417bf3837a..66d935f23ca90a3367f4ccfb3af3963b770bd478 100644
--- a/core/modules/image/image.field.inc
+++ b/core/modules/image/image.field.inc
@@ -84,7 +84,7 @@ function image_field_instance_settings_form($field, $instance) {
     '#weight' => 4.1,
     '#field_prefix' => '<div class="container-inline">',
     '#field_suffix' => '</div>',
-    '#description' => t('The maximum allowed image size expressed as WIDTHxHEIGHT (e.g. 640x480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of <a href="http://en.wikipedia.org/wiki/Exchangeable_image_file_format">EXIF data</a> in the image.'),
+    '#description' => t('The maximum allowed image size expressed as WIDTHxHEIGHT (e.g. 640x480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of <a href="@url">EXIF data</a> in the image.', array('@url' => 'http://en.wikipedia.org/wiki/Exchangeable_image_file_format')),
   );
   $form['max_resolution']['x'] = array(
     '#type' => 'number',
diff --git a/core/modules/image/image.install b/core/modules/image/image.install
index 735e0073bf0ddb475e34b53ab1955b45edac5af1..75ffd2a8f8264974f5c60b5cd9e1aecd5e7571d0 100644
--- a/core/modules/image/image.install
+++ b/core/modules/image/image.install
@@ -88,7 +88,7 @@ function image_requirements($phase) {
       // Check for filter and rotate support.
       if (!function_exists('imagefilter') || !function_exists('imagerotate')) {
         $requirements['image_gd']['severity'] = REQUIREMENT_WARNING;
-        $requirements['image_gd']['description'] = t('The GD Library for PHP is enabled, but was compiled without support for functions used by the rotate and desaturate effects. It was probably compiled using the official GD libraries from http://www.libgd.org instead of the GD library bundled with PHP. You should recompile PHP --with-gd using the bundled GD library. See <a href="http://www.php.net/manual/book.image.php">the PHP manual</a>.');
+        $requirements['image_gd']['description'] = t('The GD Library for PHP is enabled, but was compiled without support for functions used by the rotate and desaturate effects. It was probably compiled using the official GD libraries from http://www.libgd.org instead of the GD library bundled with PHP. You should recompile PHP --with-gd using the bundled GD library. See <a href="@url">the PHP manual</a>.', array('@url' => 'http://www.php.net/manual/book.image.php'));
       }
     }
     else {
diff --git a/core/modules/search/search.module b/core/modules/search/search.module
index f567dae2d9d00b8dbdb3f7cda8c52e7ec0fcedf3..bb1d7c8af8bbcd4f8fd3bf821254065e23953103 100644
--- a/core/modules/search/search.module
+++ b/core/modules/search/search.module
@@ -84,7 +84,7 @@ function search_help($path, $arg) {
       $output .= '<dt>' . t('Search block') . '</dt>';
       $output .= '<dd>' . t('The Search module includes a default <em>Search form</em> block, which can be enabled and configured on the <a href="@blocks">Blocks administration page</a>. The block is available to users with the <em>Search content</em> permission.', array('@blocks' => url('admin/structure/block'))) . '</dd>';
       $output .= '<dt>' . t('Extending Search module') . '</dt>';
-      $output .= '<dd>' . t('By default, the Search module only supports exact keyword matching in content searches. You can modify this behavior by installing a language-specific stemming module for your language (such as <a href="http://drupal.org/project/porterstemmer">Porter Stemmer</a> for American English), which allows words such as walk, walking, and walked to be matched in the Search module. Another approach is to use a third-party search technology with stemming or partial word matching features built in, such as <a href="http://drupal.org/project/apachesolr">Apache Solr</a> or <a href="http://drupal.org/project/sphinx">Sphinx</a>. These and other <a href="@contrib-search">search-related contributed modules</a> can be downloaded by visiting Drupal.org.', array('@contrib-search' => 'http://drupal.org/project/modules?filters=tid%3A105')) . '</dd>';
+      $output .= '<dd>' . t('By default, the Search module only supports exact keyword matching in content searches. You can modify this behavior by installing a language-specific stemming module for your language (such as <a href="@porterstemmer_url">Porter Stemmer</a> for American English), which allows words such as walk, walking, and walked to be matched in the Search module. Another approach is to use a third-party search technology with stemming or partial word matching features built in, such as <a href="@solr_url">Apache Solr</a> or <a href="@sphinx_url">Sphinx</a>. These and other <a href="@contrib-search">search-related contributed modules</a> can be downloaded by visiting Drupal.org.', array('@contrib-search' => 'http://drupal.org/project/modules?filters=tid%3A105', '@porterstemmer_url' => 'http://drupal.org/project/porterstemmer', '@solr_url' => 'http://drupal.org/project/apachesolr', '@sphinx_url' => 'http://drupal.org/project/sphinx')) . '</dd>';
       $output .= '</dl>';
       return $output;
     case 'admin/config/search/settings':
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index fd1fa4b60f172a06004f73bb938f9522d400bbf1..0605a1d439bdeebf399ddf3d1703393a054284cd 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -90,7 +90,7 @@ function system_requirements($phase) {
   // (register_globals off), when it is in fact on. We can only guarantee
   // register_globals is off if the value returned is 'off', '', or 0.
   if (!empty($register_globals) && strtolower($register_globals) != 'off') {
-    $requirements['php_register_globals']['description'] = $t('<em>register_globals</em> is enabled. Drupal requires this configuration directive to be disabled. Your site may not be secure when <em>register_globals</em> is enabled. The PHP manual has instructions for <a href="http://php.net/configuration.changes">how to change configuration settings</a>.');
+    $requirements['php_register_globals']['description'] = $t('<em>register_globals</em> is enabled. Drupal requires this configuration directive to be disabled. Your site may not be secure when <em>register_globals</em> is enabled. The PHP manual has instructions for <a href="@url">how to change configuration settings</a>.', array('@url' => 'http://php.net/configuration.changes'));
     $requirements['php_register_globals']['severity'] = REQUIREMENT_ERROR;
     $requirements['php_register_globals']['value'] = $t("Enabled ('@value')", array('@value' => $register_globals));
   }