diff --git a/module/bug/model.php b/module/bug/model.php
index 4a1bfeae97..6cac48e0fc 100644
--- a/module/bug/model.php
+++ b/module/bug/model.php
@@ -187,7 +187,10 @@ class bugModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $bug->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$i]);
+                $bug->{$extendField->field} = $this->post->{$extendField->field}[$i];
+                if(is_array($bug->{$extendField->field})) $bug->{$extendField->field} = join(',', $bug->{$extendField->field});
+
+                $bug->{$extendField->field} = htmlspecialchars($bug->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $bug->{$extendField->field});
                 if($message) die(js::alert($message));
             }
@@ -724,7 +727,10 @@ class bugModel extends model
 
                 foreach($extendFields as $extendField)
                 {
-                    $bug->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$bugID]);
+                    $bug->{$extendField->field} = $this->post->{$extendField->field}[$bugID];
+                    if(is_array($bug->{$extendField->field})) $bug->{$extendField->field} = join(',', $bug->{$extendField->field});
+
+                    $bug->{$extendField->field} = htmlspecialchars($bug->{$extendField->field});
                     $message = $this->checkFlowRule($extendField, $bug->{$extendField->field});
                     if($message) die(js::alert($message));
                 }
diff --git a/module/doc/control.php b/module/doc/control.php
index 6a757633ae..001181f13e 100644
--- a/module/doc/control.php
+++ b/module/doc/control.php
@@ -487,9 +487,8 @@ class doc extends control
 
         if($doc->contentType == 'markdown')
         {
-            $hyperdown    = $this->app->loadClass('hyperdown');
-            $doc->content = $hyperdown->makeHtml($doc->content);
-            $doc->digest  = $hyperdown->makeHtml($doc->digest);
+            $doc->content = $this->doc->processMarkdown($doc->content);
+            $doc->digest  = $this->doc->processMarkdown($$doc->digest);
         }
 
         /* Check priv when lib is product or project. */
@@ -917,9 +916,8 @@ class doc extends control
 
             if($doc->contentType == 'markdown')
             {
-                $hyperdown    = $this->app->loadClass('hyperdown');
-                $doc->content = $hyperdown->makeHtml($doc->content);
-                $doc->digest  = $hyperdown->makeHtml($doc->digest);
+                $doc->content = $this->doc->processMarkdown($doc->content);
+                $doc->digest  = $this->doc->processMarkdown($doc->digest);
             }
         }
 
diff --git a/module/doc/model.php b/module/doc/model.php
index cdf01db255..3f0f4c5689 100644
--- a/module/doc/model.php
+++ b/module/doc/model.php
@@ -430,6 +430,7 @@ class docModel extends model
             ->get();
 
         /* Fix bug #2929. strip_tags($this->post->contentMarkdown, $this->config->allowedTags)*/
+        $doc = $this->loadModel('file')->processImgURL($doc, $this->config->doc->editor->create['id'], $this->post->uid);
         $doc->contentMarkdown = $this->post->contentMarkdown;
         if($doc->acl == 'private') $doc->users = $this->app->user->account;
 
@@ -441,7 +442,6 @@ class docModel extends model
         }
 
         $lib = $this->getLibByID($doc->lib);
-        $doc = $this->loadModel('file')->processImgURL($doc, $this->config->doc->editor->create['id'], $this->post->uid);
         $doc->product   = $lib->product;
         $doc->project   = $lib->project;
         $doc->execution = $lib->execution;
@@ -456,13 +456,20 @@ class docModel extends model
         $docContent->content = $doc->contentType == 'html' ? $doc->content : $doc->contentMarkdown;
         $docContent->type    = $doc->contentType;
         $docContent->version = 1;
-        if($doc->contentType == 'markdown') $docContent->content = str_replace('>', '>', $docContent->content);
         unset($doc->contentMarkdown);
         unset($doc->contentType);
         unset($doc->url);
 
+        $requiredFields = $this->config->doc->create->requiredFields;
+        $checkContent   = strpos(",$requiredFields,", ',content,') !== false;
+        if($checkContent)
+        {
+            $requiredFields = trim(str_replace(',content,', ',', ",$requiredFields,"), ',');
+            if(empty($docContent->content)) return dao::$errors['content'] = sprintf($this->lang->error->notempty, $this->lang->doc->content);
+        }
+
         $this->dao->insert(TABLE_DOC)->data($doc, 'content')->autoCheck()
-            ->batchCheck($this->config->doc->create->requiredFields, 'notempty')
+            ->batchCheck($requiredFields, 'notempty')
             ->exec();
         if(!dao::isError())
         {
@@ -508,6 +515,7 @@ class docModel extends model
             ->join('mailto', ',')
             ->remove('comment,files,labels,uid,contactListMenu')
             ->get();
+        $doc = $this->loadModel('file')->processImgURL($doc, $this->config->doc->editor->edit['id'], $this->post->uid);
         if($doc->contentType == 'markdown') $doc->content = $this->post->content;
         if($doc->acl == 'private') $doc->users = $oldDoc->addedBy;
 
@@ -518,12 +526,9 @@ class docModel extends model
             $oldDoc->digest      = $oldDocContent->digest;
             $oldDoc->content     = $oldDocContent->content;
             $oldDoc->contentType = $oldDocContent->type;
-
-            if($oldDocContent->type == 'markdown') $doc->content = str_replace('>', '>', $doc->content);
         }
 
         $lib = $this->getLibByID($doc->lib);
-        $doc = $this->loadModel('file')->processImgURL($doc, $this->config->doc->editor->edit['id'], $this->post->uid);
         $doc->product   = $lib->product;
         $doc->execution = $lib->execution;
         if(isset($doc->type) and $doc->type == 'url') $doc->content = $doc->url;
@@ -538,6 +543,14 @@ class docModel extends model
             if($change['field'] == 'content' or $change['field'] == 'title') $changed = true;
         }
 
+        $requiredFields = $this->config->doc->edit->requiredFields;
+        $checkContent   = strpos(",$requiredFields,", ',content,') !== false;
+        if($checkContent)
+        {
+            $requiredFields = trim(str_replace(',content,', ',', ",$requiredFields,"), ',');
+            if(isset($doc->content) and empty($doc->content)) return dao::$errors['content'] = sprintf($this->lang->error->notempty, $this->lang->doc->content);
+        }
+
         if($changed)
         {
             $doc->version  = $oldDoc->version + 1;
@@ -557,7 +570,7 @@ class docModel extends model
 
         $this->dao->update(TABLE_DOC)->data($doc, 'content')
             ->autoCheck()
-            ->batchCheck($this->config->doc->edit->requiredFields, 'notempty')
+            ->batchCheck($requiredFields, 'notempty')
             ->where('id')->eq((int)$docID)
             ->exec();
         if(!dao::isError())
@@ -1904,4 +1917,25 @@ class docModel extends model
         if(!isset($treeMenu[$module->parent])) $treeMenu[$module->parent] = '';
         $treeMenu[$module->parent] .= '<li' . ($treeMenu[$module->id] ? ' class="closed"' : '') . '>' . $li . '</li>';
     }
+
+    /**
+     * Process markdown.
+     *
+     * @param  string  $markdown
+     * @access public
+     * @return string
+     */
+    public function processMarkdown($markdown)
+    {
+        if(empty($markdown)) return false;
+
+        $markdown = str_replace('&', '&amp;', $markdown);
+
+        $hyperdown = $this->app->loadClass('hyperdown');
+        $content   = $hyperdown->makeHtml($markdown);
+
+        $content = htmlspecialchars_decode($content);
+        $content = fixer::stripDataTags($content);
+        return $content;
+    }
 }
diff --git a/module/story/model.php b/module/story/model.php
index ee3e938a28..5db7895ca3 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -390,7 +390,10 @@ class storyModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $story->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$i]);
+                $story->{$extendField->field} = $this->post->{$extendField->field}[$i];
+                if(is_array($story->{$extendField->field})) $story->{$extendField->field} = join(',', $story->{$extendField->field});
+
+                $story->{$extendField->field} = htmlspecialchars($story->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $story->{$extendField->field});
                 if($message) die(js::alert($message));
             }
@@ -1034,7 +1037,10 @@ class storyModel extends model
 
                 foreach($extendFields as $extendField)
                 {
-                    $story->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$storyID]);
+                    $story->{$extendField->field} = $this->post->{$extendField->field}[$storyID];
+                    if(is_array($story->{$extendField->field})) $story->{$extendField->field} = join(',', $story->{$extendField->field});
+
+                    $story->{$extendField->field} = htmlspecialchars($story->{$extendField->field});
                     $message = $this->checkFlowRule($extendField, $story->{$extendField->field});
                     if($message) die(js::alert($message));
                 }
diff --git a/module/task/model.php b/module/task/model.php
index 58cc708f77..381ec5cfc6 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -317,7 +317,10 @@ class taskModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $data[$i]->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$i]);
+                $data[$i]->{$extendField->field} = $this->post->{$extendField->field}[$i];
+                if(is_array($data[$i]->{$extendField->field})) $data[$i]->{$extendField->field} = join(',', $data[$i]->{$extendField->field});
+
+                $data[$i]->{$extendField->field} = htmlspecialchars($data[$i]->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $data[$i]->{$extendField->field});
                 if($message)
                 {
@@ -1089,7 +1092,10 @@ class taskModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $task->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$taskID]);
+                $task->{$extendField->field} = $this->post->{$extendField->field}[$taskID];
+                if(is_array($task->{$extendField->field})) $task->{$extendField->field} = join(',', $task->{$extendField->field});
+
+                $task->{$extendField->field} = htmlspecialchars($task->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $task->{$extendField->field});
                 if($message) die(js::alert($message));
             }
diff --git a/module/testcase/model.php b/module/testcase/model.php
index f60252da2a..c1cdcb0543 100644
--- a/module/testcase/model.php
+++ b/module/testcase/model.php
@@ -170,7 +170,10 @@ class testcaseModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $data[$i]->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$i]);
+                $data[$i]->{$extendField->field} = $this->post->{$extendField->field}[$i];
+                if(is_array($data[$i]->{$extendField->field})) $data[$i]->{$extendField->field} = join(',', $data[$i]->{$extendField->field});
+
+                $data[$i]->{$extendField->field} = htmlspecialchars($data[$i]->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $data[$i]->{$extendField->field});
                 if($message) die(js::alert($message));
             }
@@ -854,7 +857,10 @@ class testcaseModel extends model
 
             foreach($extendFields as $extendField)
             {
-                $case->{$extendField->field} = htmlspecialchars($this->post->{$extendField->field}[$caseID]);
+                $case->{$extendField->field} = $this->post->{$extendField->field}[$caseID];
+                if(is_array($case->{$extendField->field})) $case->{$extendField->field} = join(',', $case->{$extendField->field});
+
+                $case->{$extendField->field} = htmlspecialchars($case->{$extendField->field});
                 $message = $this->checkFlowRule($extendField, $case->{$extendField->field});
                 if($message) die(js::alert($message));
             }