diff --git a/module/doc/config.php b/module/doc/config.php
index 7373514c83..e6807e4a7c 100644
--- a/module/doc/config.php
+++ b/module/doc/config.php
@@ -18,7 +18,7 @@ $config->doc->officeTypes      = 'word,ppt,excel';
 
 $config->doc->custom = new stdclass();
 $config->doc->custom->objectLibs = $config->doc->customObjectLibs;
-$config->doc->custom->showLibs   = 'zero';
+$config->doc->custom->showLibs   = 'zero,children';
 
 $config->doc->editor = new stdclass();
 $config->doc->editor->create = array('id' => 'content', 'tools' => 'fullTools');
diff --git a/module/doc/lang/en.php b/module/doc/lang/en.php
index 23c62ae02b..4ff27480d0 100644
--- a/module/doc/lang/en.php
+++ b/module/doc/lang/en.php
@@ -152,6 +152,7 @@ $lang->doc->customObjectLibs['customFiles'] = 'Show Custom Library';
 $lang->doc->orderLib = 'Library order settings';
 $lang->doc->customShowLibs = 'Library display settings';
 $lang->doc->customShowLibsList['zero']     = 'Display empty library';
+$lang->doc->customShowLibsList['children'] = 'Display sub-category documents';
 $lang->doc->customShowLibsList['unclosed'] = 'Only display projects that are not closed';
 
 $lang->doc->confirmDelete      = "Do you want to delete this document?";
diff --git a/module/doc/lang/zh-cn.php b/module/doc/lang/zh-cn.php
index c00c3d427b..66a2675372 100644
--- a/module/doc/lang/zh-cn.php
+++ b/module/doc/lang/zh-cn.php
@@ -152,6 +152,7 @@ $lang->doc->customObjectLibs['customFiles'] = '显示自定义文档库';
 $lang->doc->orderLib                       = '文档库排序';
 $lang->doc->customShowLibs                 = '显示设置';
 $lang->doc->customShowLibsList['zero']     = '显示空文档的库';
+$lang->doc->customShowLibsList['children'] = '显示子分类的文档';
 $lang->doc->customShowLibsList['unclosed'] = '只显示未关闭的项目';
 
 $lang->doc->confirmDelete      = "您确定删除该文档吗？";
diff --git a/module/doc/view/create.html.php b/module/doc/view/create.html.php
index 20f78b58ee..2a50a45c17 100644
--- a/module/doc/view/create.html.php
+++ b/module/doc/view/create.html.php
@@ -10,7 +10,7 @@
  * @link        http://www.zentao.net
  */
 ?>
-<?php if(strpos($config->doc->officeTypes, $docType) !== false):?>
+<?php if($docType != '' and strpos($config->doc->officeTypes, $docType) !== false):?>
 <?php include '../../common/view/header.lite.html.php';?>
 <div id="mainContent" class="main-content">
   <div class='center-block'>
diff --git a/module/task/lang/en.php b/module/task/lang/en.php
index 6eae7ef57d..634c99fd49 100644
--- a/module/task/lang/en.php
+++ b/module/task/lang/en.php
@@ -106,6 +106,7 @@ $lang->task->team              = 'Team';
 $lang->task->transfer          = 'Transfer';
 $lang->task->transferTo        = 'Transfer To';
 $lang->task->children          = 'Child Task';
+$lang->task->unlinkParent      = 'Unlink Parent';
 $lang->task->childrenAB        = 'Child';
 $lang->task->parent            = 'Parent Task';
 $lang->task->parentAB          = 'Parent Task';
diff --git a/module/task/lang/zh-cn.php b/module/task/lang/zh-cn.php
index 91de8cf4ff..11efa96048 100644
--- a/module/task/lang/zh-cn.php
+++ b/module/task/lang/zh-cn.php
@@ -106,6 +106,7 @@ $lang->task->team             = '团队';
 $lang->task->transfer         = '转交';
 $lang->task->transferTo       = '转交给';
 $lang->task->children         = '子任务';
+$lang->task->unlinkParent     = '取消子任务';
 $lang->task->childrenAB       = '子';
 $lang->task->parent           = '父任务';
 $lang->task->parentAB         = '父';
diff --git a/module/task/model.php b/module/task/model.php
index f0a9eb281a..e5c00ca837 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -79,6 +79,8 @@ class taskModel extends model
             }
             $requiredFields = trim($requiredFields, ',');
 
+            /* Fix Bug #2466 */
+            if($this->post->multiple) $task->assignedTo = '';
             $this->dao->insert(TABLE_TASK)->data($task)
                 ->autoCheck()
                 ->batchCheck($requiredFields, 'notempty')
@@ -653,12 +655,13 @@ class taskModel extends model
             ->setIF($this->post->assignedTo != $oldTask->assignedTo, 'assignedDate', $now)
 
             ->setIF($this->post->status == 'wait' and $this->post->left == $oldTask->left and $this->post->consumed == 0 and $this->post->estimate, 'left', $this->post->estimate)
+            ->setIF(isset($_POST['unlinkParent']), 'parent', 0)
 
             ->setDefault('lastEditedBy',   $this->app->user->account)
             ->add('lastEditedDate', $now)
             ->stripTags($this->config->task->editor->edit['id'], $this->config->allowedTags)
             ->join('mailto', ',')
-            ->remove('comment,files,labels,uid,multiple,team,teamEstimate,teamConsumed,teamLeft,contactListMenu')
+            ->remove('comment,files,labels,uid,multiple,team,teamEstimate,teamConsumed,teamLeft,contactListMenu,unlinkParent')
             ->get();
 
         if($task->consumed < $oldTask->consumed) die(js::error($this->lang->task->error->consumedSmall));
@@ -734,6 +737,7 @@ class taskModel extends model
 
         if($oldTask->parent > 0)
         {
+            if($task->parent == 0) $this->computeWorkingHours($oldTask->parent);
             $this->updateParentStatus($taskID);
             $this->computeBeginAndEnd($oldTask->parent);
         }
@@ -1688,6 +1692,11 @@ class taskModel extends model
             ->andWhere('project')->eq($projectID)
             ->fetchPairs();
 
+        foreach($tasks as $id => $name)
+        {
+            $taskTeam = $this->dao->select('*')->from(TABLE_TEAM)->where('root')->eq($id)->andWhere('type')->eq('task')->fetch();
+            if(!empty($taskTeam)) unset($tasks[$id]);
+        }
         return array('' => '') + $tasks ;
     }
 
diff --git a/module/task/view/edit.html.php b/module/task/view/edit.html.php
index 031f97f5e3..b588ea1f19 100644
--- a/module/task/view/edit.html.php
+++ b/module/task/view/edit.html.php
@@ -109,6 +109,12 @@
                 <td><?php echo html::select('parent', $tasks, $task->parent, "class='form-control chosen'");?></td>
               </tr>
               <?php endif;?>
+              <?php if($task->parent > 0):?>
+              <tr>
+                <th><?php echo $lang->task->unlinkParent;?></th>
+                <td><?php echo html::checkbox('unlinkParent', '');?></td>
+              </tr>
+              <?php endif;?>
               <tr>
                 <th><?php echo $lang->task->assignedTo;?></th>
                 <td><span id="assignedToIdBox"><?php echo html::select('assignedTo', $members, $task->assignedTo, "class='form-control chosen'");?></span></td>
diff --git a/module/testtask/control.php b/module/testtask/control.php
index ca2336527a..9fb853c21c 100644
--- a/module/testtask/control.php
+++ b/module/testtask/control.php
@@ -832,7 +832,8 @@ class testtask extends control
             $caseResult = $this->testtask->createResult($runID);
             if(dao::isError()) die(js::error(dao::getError()));
 
-            if($caseResult == 'fail') {
+            if($caseResult == 'fail')
+            {
 
                 $response['result']  = 'success';
                 $response['locate']  = $this->createLink('testtask', 'results',"runID=$runID&caseID=$caseID&version=$version");