diff --git a/admin/roles/assign.html b/admin/roles/assign.html
index 179e25c9fa5..7faeb9245fc 100755
--- a/admin/roles/assign.html
+++ b/admin/roles/assign.html
@@ -1,4 +1,4 @@
-
+<?php die; ?>
 <form name="assignform" id="assignform" method="post" action="">
 <input type="hidden" name="previoussearch" value="<?php p($previoussearch) ?>" />
 <input type="hidden" name="userid" value="<?php p($userid) ?>" />
diff --git a/admin/roles/assign.php b/admin/roles/assign.php
index a8419543a6b..d49957c5037 100755
--- a/admin/roles/assign.php
+++ b/admin/roles/assign.php
@@ -98,13 +98,13 @@
         if ($courseid != SITEID) {
             print_header("$fullname", "$fullname",
                      "<a href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</a> ->
-                      <a href=\"$CFG->wwwroot/user/index.php?id=$course->id\">$strparticipants</a> -> <a href=\"$CFG->wwwroot/user/view.php?id=$userid&course=$courseid\">$fullname</a> ->".$straction,
+                      <a href=\"$CFG->wwwroot/user/index.php?id=$course->id\">$strparticipants</a> -> <a href=\"$CFG->wwwroot/user/view.php?id=$userid&amp;course=$courseid\">$fullname</a> ->".$straction,
                       "", "", true, "&nbsp;", navmenu($course));
 
         /// site header
         } else {
             print_header("$course->fullname: $fullname", "$course->fullname",
-                        "<a href=\"$CFG->wwwroot/user/view.php?id=$userid&course=$courseid\">$fullname</a> -> $straction", "", "", true, "&nbsp;", navmenu($course));
+                        "<a href=\"$CFG->wwwroot/user/view.php?id=$userid&amp;course=$courseid\">$fullname</a> -> $straction", "", "", true, "&nbsp;", navmenu($course));
         }
 
         $showroles = 1;
diff --git a/admin/roles/tabs.php b/admin/roles/tabs.php
index e3dc0117d92..94e647e66c5 100755
--- a/admin/roles/tabs.php
+++ b/admin/roles/tabs.php
@@ -66,7 +66,7 @@ if ($currenttab != 'update') {
             $COURSE = $course;
             print_header_simple($streditinga, '',
                     "<a href=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</a> ->
-                    $strnav <a href=\"$CFG->wwwroot/course/mod.php?update=$cm->id&sesskey=".sesskey()."\">$streditinga</a> -> $straction", $focuscursor, "", false);
+                    $strnav <a href=\"$CFG->wwwroot/course/mod.php?update=$cm->id&amp;sesskey=".sesskey()."\">$streditinga</a> -> $straction", $focuscursor, "", false);
 
             break;