diff --git a/module/task/model.php b/module/task/model.php
index fe042c3a73..867739533b 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -29,12 +29,16 @@ class taskModel extends model
             ->setDefault('project', (int)$projectID)
             ->setDefault('estimate, left, story', 0)
             ->setDefault('status', 'wait')
+            ->setDefault('estimate',(int)$this->post->estimate) 
             ->setIF($this->post->estimate != false, 'left', $this->post->estimate)
             ->setIF($this->post->story != false, 'storyVersion', $this->loadModel('story')->getVersion($this->post->story))
             ->setDefault('estStarted', '0000-00-00')
             ->setDefault('deadline', '0000-00-00')
             ->setIF(strpos($this->config->task->create->requiredFields, 'estStarted') !== false, 'estStarted', $this->post->estStarted)
             ->setIF(strpos($this->config->task->create->requiredFields, 'deadline') !== false, 'deadline', $this->post->deadline)
+            ->setIF($this->post->estimate !== 0, 'estimate', (int)$this->post->estimate)
+            ->setIF($this->post->consumed !== 0, 'consumed', (int)$this->post->consumed)
+            ->setIF($this->post->left     !== 0, 'left',     (int)$this->post->left)
             ->setDefault('openedBy',   $this->app->user->account)
             ->setDefault('openedDate', helper::now())
             ->stripTags($this->config->task->editor->create['id'], $this->config->allowedTags)
@@ -578,6 +582,9 @@ class taskModel extends model
             ->setDefault('story, estimate, left, consumed', 0)
             ->setDefault('estStarted', '0000-00-00')
             ->setDefault('deadline', '0000-00-00')
+            ->setIF($this->post->estimate !== 0, 'estimate', (int)$this->post->estimate)
+            ->setIF($this->post->consumed !== 0, 'consumed', (int)$this->post->consumed)
+            ->setIF($this->post->left     !== 0, 'left',     (int)$this->post->left)
             ->setIF($oldTask->parent == 0 && $this->post->parent == '', 'parent', 0)
             ->setIF(strpos($this->config->task->edit->requiredFields, 'estStarted') !== false, 'estStarted', $this->post->estStarted)
             ->setIF(strpos($this->config->task->edit->requiredFields, 'deadline') !== false, 'deadline', $this->post->deadline)
@@ -1170,6 +1177,7 @@ class taskModel extends model
         }
 
         $task = fixer::input('post')
+            ->setIF($this->post->consumed !== 0, 'consumed', (int)$this->post->consumed)
             ->setDefault('left', 0)
             ->setDefault('assignedTo',   $oldTask->openedBy)
             ->setDefault('assignedDate', $now)
@@ -1229,6 +1237,7 @@ class taskModel extends model
         }
 
         if($task->finishedDate == substr($now, 0, 10)) $task->finishedDate = $now;
+        $task->consumed = (int)$task->consumed;
 
         $this->dao->update(TABLE_TASK)->data($task)
             ->autoCheck()
@@ -1349,6 +1358,7 @@ class taskModel extends model
 
         $oldTask = $this->getById($taskID);
         $task = fixer::input('post')
+            ->setIF($this->post->left !== 0, 'left', (int)$this->post->left)
             ->setDefault('left', 0)
             ->setDefault('status', 'doing')
             ->setDefault('finishedBy, canceledBy, closedBy, closedReason', '')
@@ -1359,6 +1369,12 @@ class taskModel extends model
             ->remove('comment')
             ->get();
 
+        if(!is_numeric($task->left))
+        {
+            dao::$errors[] = $this->lang->task->error->estimateNumber;
+            return false;
+        }
+
         if(!empty($oldTask->team))
         {
             $this->dao->update(TABLE_TEAM)->set('left')->eq($this->post->left)