diff --git a/print.php b/print.php
index 2821239..f3daf0c 100755
--- a/print.php
+++ b/print.php
@@ -33,7 +33,7 @@
     {
         require( "cross/play.php");
 
-        $attempt = game_getattempt( $game, &$crossrec); 
+        $attempt = game_getattempt( $game, $crossrec); 
         
         $g = '';
         $onlyshow = true;
diff --git a/showanswers.php b/showanswers.php
index f268d78..9ff4782 100755
--- a/showanswers.php
+++ b/showanswers.php
@@ -109,7 +109,7 @@ function game_showusers($game)
 function game_showanswers( $game, $existsbook, $context)
 {
     if( $game->gamekind == 'bookquiz' and $existsbook){
-        game_showanswers_bookquiz( $game);
+        game_showanswers_bookquiz( $game, $context);
         return;
     }
     
@@ -398,7 +398,7 @@ function game_showanswers_glossary( $game)
     echo "</table><br>\r\n\r\n";
 }
 
-function game_showanswers_bookquiz( $game)
+function game_showanswers_bookquiz( $game, $context)
 {
     global $CFG;
     
@@ -407,5 +407,6 @@ function game_showanswers_bookquiz( $game)
 			  " AND bc.id = gbq.chapterid";
 	$table = "{question} q,{game_bookquiz_questions} gbq,{book_chapters} bc";
 	
-    game_showanswers_question_select( $game, $table, $select, "DISTINCT q.*", "bc.pagenum,questiontext");
+    $showcategories = ($game->gamekind == 'bookquiz');
+    game_showanswers_question_select( $game, $table, $select, "DISTINCT q.*", "bc.pagenum,questiontext", $showcategories, $game->course, $context);
 }
diff --git a/sudoku/play.php b/sudoku/play.php
index 1ed1cc5..a17df09 100755
--- a/sudoku/play.php
+++ b/sudoku/play.php
@@ -574,7 +574,8 @@ function game_sudoku_check_glossaryentries( $id, $game, $attempt, $sudoku, $fini
         //correct answer
         $select = "attemptid=$attempt->id";
         $select .= " AND glossaryentryid=$entry->id AND col>0";
-            
+        $select .= " AND questiontext is null"; // check the student guesses not source glossary entry.
+           
 		$query = new stdClass();
         if( ($query->id = $DB->get_field_select( 'game_queries', 'id', $select)) == 0){
 			echo "not found $select<br>";
diff --git a/translate.php b/translate.php
index ee951f6..06ae926 100755
--- a/translate.php
+++ b/translate.php
@@ -166,6 +166,9 @@ sort( $strings);
 foreach( $langname as $lang => $name)
 {
     $strings_lang = readlangfile( $lang, $header);
+    if (empty($string_lang)) {
+        continue;
+    }
     $ret = '';
     
     foreach( $strings_lang as $key => $value)
@@ -230,6 +233,9 @@ function readlangfile( $lang, &$header)
     global $CFG;
 
     $file = $CFG->dirroot.'/mod/game/lang/'.$lang.'/game.php';
+    if (!is_file($file)) {
+        return null;
+    }
 
     $a = array();
 
@@ -289,7 +295,7 @@ function readsourcecode( $file, &$strings)
     $lines = file( $file);
     foreach( $lines as $line)
     {
-        parseline( &$strings, $line, $file);
+        parseline( $strings, $line, $file);
     }
 
     return $strings;
diff --git a/version.php b/version.php
index 6f06066..85cfd15 100755
--- a/version.php
+++ b/version.php
@@ -11,7 +11,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 $module->component = 'mod_game';  // Full name of the plugin (used for diagnostics)
-$module->version   = 2013122502;  // The current module version (Date: YYYYMMDDXX)
+$module->version   = 2013122503;  // The current module version (Date: YYYYMMDDXX)
 $module->requires  = 2010112400;  // Requires Moodle 2.0
 $module->cron      = 0;           // Period for cron to check this module (secs)
-$module->release   = '3.12.25.2';
+$module->release   = '3.12.25.3';