diff -ur project_issue/issue.inc project_issue_new/issue.inc
--- project_issue/issue.inc	2007-04-21 00:23:12.341334400 +0300
+++ project_issue_new/issue.inc	2007-04-21 00:22:42.157932800 +0300
@@ -1530,7 +1530,7 @@
       if (!$project->nid) {
         $row[] = l($projects[$node->pid], "project/issues/$node->pid");
       }
-      $row[] = l(substr($node->title, 0, 50), "node/$node->nid") . theme('mark', node_mark($node->nid, $node->changed));
+      $row[] = l(drupal_substr($node->title, 0, 50), "node/$node->nid") . theme('mark', node_mark($node->nid, $node->changed));
       $row[] = $states[$node->sid];
       $row[] = $priorities[$node->priority];
       $row[] = t($node->category);
diff -ur project_issue/mail.inc project_issue_new/mail.inc
--- project_issue/mail.inc	2007-04-21 00:23:13.242630400 +0300
+++ project_issue_new/mail.inc	2007-04-21 00:22:51.210950400 +0300
@@ -271,7 +271,7 @@
   $hr = str_repeat('-', 72);
 
   // Create mail header
-  $sender->name = mime_header_encode(($pos = strpos($node->updator, '@')) ? substr($node->updator, 0, $pos) : $node->updator);
+  $sender->name = mime_header_encode(($pos = strpos($node->updator, '@')) ? drupal_substr($node->updator, 0, $pos) : $node->updator);
   $sender->mail = $project->mail;
   $domain = preg_replace('|.+://([a-zA-Z0-9\._-]+).*|', '\1', $GLOBALS['base_url']);
   $header = array(