diff --git a/module/bug/view/browse.html.php b/module/bug/view/browse.html.php
index 1cbfbd6389..e437f60270 100644
--- a/module/bug/view/browse.html.php
+++ b/module/bug/view/browse.html.php
@@ -145,14 +145,14 @@ if($customed)
             <td class='a-left' title="<?php echo $bug->storyTitle?>"><?php echo html::a($this->createLink('story', 'view', "stoyID=$bug->story"), $bug->storyTitle, '_blank');?></td>
             <td><?php $lang->bug->confirmStoryChange = $lang->confirm; common::printIcon('bug', 'confirmStoryChange', "bugID=$bug->id", '', 'list', '', 'hiddenwin')?></td>
             <?php else:?>
-            <td><?php echo $users[$bug->openedBy];?></td>
+            <td><?php echo zget($users, $bug->openedBy, $bug->openedBy);?></td>
 
             <?php if($this->cookie->windowWidth >= $this->config->wideSize):?>
             <td><?php echo substr($bug->openedDate, 5, 11)?></td>
             <?php endif;?>
 
-            <td <?php if($bug->assignedTo == $this->app->user->account) echo 'class="red"';?>><?php echo $users[$bug->assignedTo];?></td>
-            <td><?php echo $users[$bug->resolvedBy];?></td>
+            <td <?php if($bug->assignedTo == $this->app->user->account) echo 'class="red"';?>><?php echo zget($users, $bug->assignedTo, $bug->assignedTo);?></td>
+            <td><?php echo zget($users, $bug->resolvedBy, $bug->resolvedBy)?></td>
             <td><?php echo $lang->bug->resolutionList[$bug->resolution];?></td>
 
             <?php if($this->cookie->windowWidth >= $this->config->wideSize):?>
diff --git a/module/common/model.php b/module/common/model.php
index e7dd0d9e4c..740c298d27 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -493,8 +493,11 @@ class commonModel extends model
         echo html::a(helper::createLink('my', 'index'), $lang->zentaoPMS) . $lang->arrow;
         if($moduleName != 'index')
         {
-            list($menuLabel, $module, $method) = explode('|', $lang->menu->$mainMenu);
-            echo html::a(helper::createLink($module, $method), $menuLabel);
+            if(isset($lang->menu->$mainMenu))
+            {
+                list($menuLabel, $module, $method) = explode('|', $lang->menu->$mainMenu);
+                echo html::a(helper::createLink($module, $method), $menuLabel);
+            }
         }
         else
         {
diff --git a/module/project/view/bug.html.php b/module/project/view/bug.html.php
index e1af1bab9d..7113ddbe82 100644
--- a/module/project/view/bug.html.php
+++ b/module/project/view/bug.html.php
@@ -43,9 +43,9 @@
     <td><span class='<?php echo 'severity' . $lang->bug->severityList[$bug->severity]?>'><?php echo $lang->bug->severityList[$bug->severity]?></span></td>
     <td><span class='<?php echo 'pri' . $lang->bug->priList[$bug->pri]?>'><?php echo $lang->bug->priList[$bug->pri]?></span></td>
     <td class='a-left' title="<?php echo $bug->title?>"><?php echo html::a($this->createLink('bug', 'view', "bugID=$bug->id"), $bug->title);?></td>
-    <td><?php echo $users[$bug->openedBy];?></td>
-    <td><?php echo $users[$bug->assignedTo];?></td>
-    <td><?php echo $users[$bug->resolvedBy];?></td>
+    <td><?php echo zget($users, $bug->openedBy, $bug->openedBy);?></td>
+    <td><?php echo zget($users, $bug->assignedTo, $bug->assignedTo);?></td>
+    <td><?php echo zget($users, $bug->resolvedBy, $bug->resolvedBy);?></td>
     <td><?php echo $lang->bug->resolutionList[$bug->resolution];?></td>
     <td class='a-right'>
       <?php
diff --git a/module/testcase/model.php b/module/testcase/model.php
index 1dbc027066..9fb8ce2574 100644
--- a/module/testcase/model.php
+++ b/module/testcase/model.php
@@ -245,6 +245,7 @@ class testcaseModel extends model
                 foreach($this->post->steps as $stepID => $stepDesc)
                 {
                     if(empty($stepDesc)) continue;
+                    $step = new stdclass();
                     $step->case    = $caseID;
                     $step->version = $version;
                     $step->desc    = htmlspecialchars($stepDesc);
diff --git a/module/tree/model.php b/module/tree/model.php
index ac02e4d447..b7a5330a71 100644
--- a/module/tree/model.php
+++ b/module/tree/model.php
@@ -814,12 +814,12 @@ class treeModel extends model
     public function getStoryModule($moduleID)
     {
         $module = $this->dao->select('id,type,parent')->from(TABLE_MODULE)->where('id')->eq($moduleID)->fetch();
-        while($module->id and $module->type != 'story')
+        if($module->id and $module->type != 'story')
         {
             $module = $this->dao->select('id,type,parent')->from(TABLE_MODULE)->where('id')->eq($module->parent)->fetch();
         }
        
-        return $module->id;
+        return empty($module) ? 0 : $module->id;
     }
 
     /**
@@ -973,6 +973,7 @@ class treeModel extends model
                 if(!isset($modules[$parentModuleID]) and $parentModuleID != 0) continue;
                 if($parentModuleID == 0)
                 {
+                    $parentModule = new stdclass();
                     $parentModule->grade = 0;
                     $parentModule->path  = ',';
                 }