Index: type/webwork/instructorpreview.php
===================================================================
--- type/webwork/instructorpreview.php	(revision 557)
+++ type/webwork/instructorpreview.php	(working copy)
@@ -71,19 +71,18 @@
     } else {
         $questions[$id]->maxgrade = $questions[$id]->defaultgrade;
     }
+    
+    $cm = get_coursemodule_from_instance("quiz", $quiz->id, $quiz->course);
+    $context = get_context_instance(CONTEXT_MODULE, $cm->id);
 
+    if (!has_capability('mod/quiz:preview', $context)) {
+        error("You can't preview these questions!");
+    }
+    
     $quiz->id = 0; // just for safety
     $quiz->questions = $id;
+    
 
-    if (!$category = get_record("question_categories", "id", $questions[$id]->category)) {
-        error("This question doesn't belong to a valid category!");
-    }
-
-    if (!has_capability('moodle/question:manage', get_context_instance(CONTEXT_COURSE, $category->course)) and !$category->publish) {
-        error("You can't preview these questions!");
-    }
-    $quiz->course = $category->course;
-
     // Load the question type specific information
     if (!get_question_options($questions)) {
         error(get_string('newattemptfail', 'quiz'));
Index: type/webwork/emailinstructor.php
===================================================================
--- type/webwork/emailinstructor.php	(revision 557)
+++ type/webwork/emailinstructor.php	(working copy)
@@ -103,9 +103,11 @@
         $message = $info . $message;
         $msghtml = $message;
         $msgtext = html_to_text($message);
-        $context = get_context_instance(CONTEXT_COURSE, $course->id);
+        $cm = get_coursemodule_from_instance("quiz", $quiz->id, $course->id);
+        $context = get_context_instance(CONTEXT_MODULE, $cm->id);
+        $groups = groups_get_user_groups($course->id, $USER->id);
         $sentsomewhere = false;
-        if ($users = get_users_by_capability($context, 'moodle/course:viewcoursegrades')) {
+        if ($users = get_users_by_capability($context, 'mod/quiz:viewreports', '', '', '', '', $groups[0], '', false, false, true)) {
             foreach ($users as $user) {
                 if(email_to_user($user,$USER,get_string('wwquestion','qtype_webwork'),$msgtext,$msghtml,NULL,NULL,$USER->email,$USER->email,$USER->firstname . ' ' . $USER->lastname)) {
                     $sentsomewhere = true;
Index: format/webwork/format.php
===================================================================
--- format/webwork/format.php	(revision 557)
+++ format/webwork/format.php	(working copy)
@@ -155,7 +155,8 @@
                     $qdiff = $qend-$qstart;
                     echo "Generated ~($qdiff secs)<br>";
                     $question->webwork = $wwquestion;
-                    $question->questiontext = addslashes(base64_decode($wwquestion->render(0,array(),0)));
+                    $answers = array();
+                    $question->questiontext = addslashes(base64_decode($wwquestion->render(0,$answers,0)));
                     $question->questiontextformat = 1;
                     unset($question->code);
                     unset($question->codecheck);