Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.1000
diff -u -p -r1.1000 common.inc
--- includes/common.inc	29 Sep 2009 17:52:46 -0000	1.1000
+++ includes/common.inc	30 Sep 2009 03:13:49 -0000
@@ -2318,6 +2318,24 @@ function _format_date_callback(array $ma
 }
 
 /**
+ * Format a username from a $account object.
+ *
+ * @param $account
+ *   The account object for the user.
+ * @param $output
+ *   Optional flag - normally should be left as CHECK_PLAIN. Only set to
+ *   PASS_THROUGH if you are sure that the output will be sanitized by some
+ *   other code prior to being printed.
+ * @return
+ *   A string.
+ */
+function format_username($account, $output = CHECK_PLAIN) {
+  $name = !empty($account->name) ? $account->name : variable_get('anonymous', t('Anonymous'));
+  drupal_alter('username', $name, $account);
+  return ($output == PASS_THROUGH) ? $name : check_plain($name);
+}
+
+/**
  * @} End of "defgroup format".
  */
 
Index: modules/blog/blog.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/blog/blog.module,v
retrieving revision 1.335
diff -u -p -r1.335 blog.module
--- modules/blog/blog.module	29 Aug 2009 05:46:02 -0000	1.335
+++ modules/blog/blog.module	30 Sep 2009 03:13:50 -0000
@@ -27,7 +27,7 @@ function blog_user_view($account) {
     $account->content['summary']['blog'] =  array(
       '#type' => 'user_profile_item',
       '#title' => t('Blog'),
-      '#markup' => l(t('View recent blog entries'), "blog/$account->uid", array('attributes' => array('title' => t("Read !username's latest blog entries.", array('!username' => $account->name))))),
+      '#markup' => l(t('View recent blog entries'), "blog/$account->uid", array('attributes' => array('title' => t("Read !username's latest blog entries.", array('!username' => format_username($account, PASS_THROUGH)))))),
       '#attributes' => array('class' => array('blog')),
     );
   }
@@ -60,7 +60,7 @@ function blog_form($node, $form_state) {
 function blog_view($node, $build_mode) {
   if ((bool)menu_get_object()) {
     // Breadcrumb navigation.
-    drupal_set_breadcrumb(array(l(t('Home'), NULL), l(t('Blogs'), 'blog'), l(t("!name's blog", array('!name' => $node->name)), 'blog/' . $node->uid)));
+    drupal_set_breadcrumb(array(l(t('Home'), NULL), l(t('Blogs'), 'blog'), l(t("!name's blog", array('!name' => format_username($node, PASS_THROUGH))), 'blog/' . $node->uid)));
   }
   return $node;
 }
@@ -72,9 +72,9 @@ function blog_node_view($node, $build_mo
   if ($build_mode != 'rss') {
     if ($node->type == 'blog' && arg(0) != 'blog' || arg(1) != $node->uid) {
       $links['blog_usernames_blog'] = array(
-        'title' => t("!username's blog", array('!username' => $node->name)),
+        'title' => t("!username's blog", array('!username' => format_username($node, PASS_THROUGH))),
         'href' => "blog/$node->uid",
-        'attributes' => array('title' => t("Read !username's latest blog entries.", array('!username' => $node->name))),
+        'attributes' => array('title' => t("Read !username's latest blog entries.", array('!username' => format_username($node, PASS_THROUGH)))),
       );
       $node->content['links']['blog'] = array(
         '#theme' => 'links',
Index: modules/blog/blog.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/blog/blog.pages.inc,v
retrieving revision 1.22
diff -u -p -r1.22 blog.pages.inc
--- modules/blog/blog.pages.inc	10 Aug 2009 22:39:24 -0000	1.22
+++ modules/blog/blog.pages.inc	30 Sep 2009 03:13:50 -0000
@@ -12,7 +12,7 @@
 function blog_page_user($account) {
   global $user;
 
-  drupal_set_title($title = t("@name's blog", array('@name' => $account->name)), PASS_THROUGH);
+  drupal_set_title($title = t("@name's blog", array('@name' => format_username($account, PASS_THROUGH))), PASS_THROUGH);
 
   $items = array();
 
@@ -123,7 +123,7 @@ function blog_feed_user($account) {
     ->execute()
     ->fetchCol();
 
-  $channel['title'] = t("!name's blog", array('!name' => $account->name));
+  $channel['title'] = t("!name's blog", array('!name' => format_username($account, PASS_THROUGH)));
   $channel['link'] = url('blog/' . $account->uid, array('absolute' => TRUE));
 
   node_feed($nids, $channel);
Index: modules/blog/blog.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/blog/blog.test,v
retrieving revision 1.18
diff -u -p -r1.18 blog.test
--- modules/blog/blog.test	22 Aug 2009 00:58:52 -0000	1.18
+++ modules/blog/blog.test	30 Sep 2009 03:13:50 -0000
@@ -38,7 +38,7 @@ class BlogTestCase extends DrupalWebTest
 
     $this->drupalGet('blog/' . $this->big_user->uid);
     $this->assertResponse(200);
-    $this->assertTitle(t("@name's blog", array('@name' => $this->big_user->name)) . ' | Drupal', t('Blog title was displayed'));
+    $this->assertTitle(t("@name's blog", array('@name' => format_username($this->big_user, PASS_THROUGH))) . ' | Drupal', t('Blog title was displayed'));
     $this->assertText(t('You are not allowed to post a new blog entry.'), t('No new entries can be posted without the right permission'));
   }
 
@@ -50,7 +50,7 @@ class BlogTestCase extends DrupalWebTest
 
     $this->drupalGet('blog/' . $this->own_user->uid);
     $this->assertResponse(200);
-    $this->assertTitle(t("@name's blog", array('@name' => $this->own_user->name)) . ' | Drupal', t('Blog title was displayed'));
+    $this->assertTitle(t("@name's blog", array('@name' => format_username($this->own_user, PASS_THROUGH))) . ' | Drupal', t('Blog title was displayed'));
     $this->assertText(t('!author has not created any blog entries.', array('!author' => $this->own_user->name)), t('Users blog displayed with no entries'));
   }
 
@@ -180,7 +180,7 @@ class BlogTestCase extends DrupalWebTest
 
     // Confirm the recent blog entries link goes to the user's blog page.
     $this->clickLink('View recent blog entries');
-    $this->assertTitle(t("@name's blog | Drupal", array('@name' => $user->name)), t('View recent blog entries link target was correct'));
+    $this->assertTitle(t("@name's blog | Drupal", array('@name' => format_username($user, PASS_THROUGH))), t('View recent blog entries link target was correct'));
 
     // Confirm a blog page was displayed.
     $this->drupalGet('blog');
@@ -191,7 +191,7 @@ class BlogTestCase extends DrupalWebTest
 
     // Confirm a blog page was displayed per user.
     $this->drupalGet('blog/' . $user->uid);
-    $this->assertTitle(t("@name's blog | Drupal", array('@name' => $user->name)), t('User blog node was displayed'));
+    $this->assertTitle(t("@name's blog | Drupal", array('@name' => format_username($user, PASS_THROUGH))), t('User blog node was displayed'));
 
     // Confirm a blog feed was displayed.
     $this->drupalGet('blog/feed');
@@ -199,6 +199,6 @@ class BlogTestCase extends DrupalWebTest
 
     // Confirm a blog feed was displayed per user.
     $this->drupalGet('blog/' . $user->uid . '/feed');
-    $this->assertTitle(t("@name's blog", array('@name' => $user->name)), t('User blog feed was displayed'));
+    $this->assertTitle(t("@name's blog", array('@name' => format_username($user, PASS_THROUGH))), t('User blog feed was displayed'));
   }
 }
Index: modules/contact/contact.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/contact/contact.pages.inc,v
retrieving revision 1.26
diff -u -p -r1.26 contact.pages.inc
--- modules/contact/contact.pages.inc	29 Sep 2009 15:31:14 -0000	1.26
+++ modules/contact/contact.pages.inc	30 Sep 2009 03:13:50 -0000
@@ -54,7 +54,7 @@ function contact_site_form() {
     '#type' => 'textfield',
     '#title' => t('Your name'),
     '#maxlength' => 255,
-    '#default_value' => $user->uid ? $user->name : '',
+    '#default_value' => format_username($user, PASS_THROUGH),
     '#required' => TRUE,
   );
   $form['mail'] = array(
@@ -161,7 +161,7 @@ function contact_personal_page($account)
     $output = t("You cannot send more than %number messages in @interval. Please try again later.", array('%number' => variable_get('contact_threshold_limit', 3), '@interval' => format_interval(variable_get('contact_threshold_window', 3600))));
   }
   else {
-    drupal_set_title($account->name);
+    drupal_set_title(format_username($account, PASS_THROUGH));
     $output = drupal_get_form('contact_personal_form', $account);
   }
 
Index: modules/openid/openid.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/openid/openid.pages.inc,v
retrieving revision 1.22
diff -u -p -r1.22 openid.pages.inc
--- modules/openid/openid.pages.inc	21 Sep 2009 06:44:14 -0000	1.22
+++ modules/openid/openid.pages.inc	30 Sep 2009 03:13:50 -0000
@@ -28,7 +28,7 @@ function openid_authentication_page() {
  * Menu callback; Manage OpenID identities for the specified user.
  */
 function openid_user_identities($account) {
-  drupal_set_title($account->name);
+  drupal_set_title(format_username($account, PASS_THROUGH));
   drupal_add_css(drupal_get_path('module', 'openid') . '/openid.css');
 
   // Check to see if we got a response
@@ -54,8 +54,8 @@ function openid_user_identities($account
   }
 
   $build['openid_table'] = array(
-    '#theme' => 'table', 
-    '#header' => $header, 
+    '#theme' => 'table',
+    '#header' => $header,
     '#rows' => $rows,
   );
   $build['openid_user_add'] = drupal_get_form('openid_user_add');
Index: modules/tracker/tracker.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/tracker/tracker.pages.inc,v
retrieving revision 1.25
diff -u -p -r1.25 tracker.pages.inc
--- modules/tracker/tracker.pages.inc	5 Sep 2009 15:05:05 -0000	1.25
+++ modules/tracker/tracker.pages.inc	30 Sep 2009 03:13:50 -0000
@@ -19,7 +19,7 @@ function tracker_page($account = NULL, $
       // When viewed from user/%user/track, display the name of the user
       // as page title -- the tab title remains Track so this needs to be done
       // here and not in the menu definition.
-      drupal_set_title($account->name);
+      drupal_set_title(format_username($account, PASS_THROUGH));
     }
   }
   else {
Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.1054
diff -u -p -r1.1054 user.module
--- modules/user/user.module	29 Sep 2009 15:31:16 -0000	1.1054
+++ modules/user/user.module	30 Sep 2009 03:13:50 -0000
@@ -817,7 +817,7 @@ function user_search_execute($keys = NUL
     ->limit(15)
     ->execute();
   foreach ($result as $account) {
-    $find[] = array('title' => $account->name . ' (' . $account->mail . ')', 'link' => url('user/' . $account->uid, array('absolute' => TRUE)));
+    $find[] = array('title' => format_username($account, PASS_THROUGH) . ' (' . $account->mail . ')', 'link' => url('user/' . $account->uid, array('absolute' => TRUE)));
   }
   return $find;
 }
@@ -1473,7 +1473,7 @@ function user_uid_optional_to_arg($arg) 
  * Menu item title callback - use the user name.
  */
 function user_page_title($account) {
-  return $account->name;
+  return format_username($account, PASS_THROUGH);
 }
 
 /**
@@ -2057,7 +2057,7 @@ function _user_cancel($edit, $account, $
  *   The user account of the profile being viewed.
  *
  * To theme user profiles, copy modules/user/user-profile.tpl.php
- * to your theme directory, and edit it as instructed in that file's comments. 
+ * to your theme directory, and edit it as instructed in that file's comments.
  *
  * @param $account
  *   A user object.
@@ -2072,7 +2072,7 @@ function user_build($account) {
   $build = $account->content;
   // We don't need duplicate rendering info in account->content.
   unset($account->content);
-  
+
   $build += array(
     '#theme' => 'user_profile',
     '#account' => $account,
Index: modules/user/user.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.pages.inc,v
retrieving revision 1.57
diff -u -p -r1.57 user.pages.inc
--- modules/user/user.pages.inc	29 Sep 2009 15:31:17 -0000	1.57
+++ modules/user/user.pages.inc	30 Sep 2009 03:13:50 -0000
@@ -213,7 +213,7 @@ function template_preprocess_user_profil
  * Menu callback; Present the form to edit a given user or profile category.
  */
 function user_edit($account, $category = 'account') {
-  drupal_set_title($account->name);
+  drupal_set_title(format_username($account, PASS_THROUGH));
   return drupal_get_form('user_profile_form', $account, $category);
 }