diff --git a/application/controllers/InstallerController.php b/application/controllers/InstallerController.php
index 0e4e34023ea..17b1e9acffe 100644
--- a/application/controllers/InstallerController.php
+++ b/application/controllers/InstallerController.php
@@ -830,6 +830,10 @@ function check_DirectoryWriteable($directory, &$data, $base, $keyError, $bRecurs
         if (version_compare(PHP_VERSION, '5.1.6', '<'))
             $bProceed = !$data['verror'] = true;
 
+        if ($this->return_bytes(ini_get('memory_limit'))/1024/1024<64)
+            $bProceed = !$data['bMemoryError'] = true;
+        
+            
         // mbstring library check
         if (!check_PHPFunction('mb_convert_encoding', $data['mbstringPresent']))
             $bProceed = false;
@@ -1232,5 +1236,26 @@ function _dbConnect($aDbConfig = array(), $aData = array())
             }
         }
     }
+    
+    /**
+    * This function returns the full number from a PHP ini value
+    * 
+    * @param string $sValue
+    */
+    function return_bytes($sValue) {
+        $sValue = trim($sValue);
+        $last = strtolower($sValue[strlen($sValue)-1]);
+        switch($last) {
+            // The 'G' modifier is available since PHP 5.1.0
+            case 'g':
+                $sValue *= 1024;
+            case 'm':
+                $sValue *= 1024;
+            case 'k':
+                $sValue *= 1024;
+        }
+
+        return $sValue;
+    }    
 
 }
diff --git a/application/controllers/admin/checkintegrity.php b/application/controllers/admin/checkintegrity.php
index f0326793e08..e5ed5a2033d 100644
--- a/application/controllers/admin/checkintegrity.php
+++ b/application/controllers/admin/checkintegrity.php
@@ -340,7 +340,8 @@ protected function _checkintegrity()
         $surveys = Survey::model()->findAll();
         $sids = array();
         foreach ($surveys as $survey) $sids[] = $survey['sid'];
-        $criteria->addNotInCondition('sid', $sids, 'OR');
+        $criteria->addNotInCondition('entity_id', $sids, 'OR');
+        $criteria->addCondition("entity='survey'");
 
         Permission::model()->deleteAll($criteria);
         
diff --git a/application/views/installer/precheck_view.php b/application/views/installer/precheck_view.php
index 2334c0b83fc..e6748972ac8 100644
--- a/application/views/installer/precheck_view.php
+++ b/application/views/installer/precheck_view.php
@@ -59,6 +59,13 @@ function dirReport($dir, $write, $clang)
                <td><?php if (isset($verror) && $verror) { ?><span style='font-weight:bold; color: red'><?php $clang->eT("Outdated"); ?>: <?php echo $phpVersion; ?></span>
                <?php } else { ?><?php echo $phpVersion ; ?> <?php } ?></td>
         </tr>
+        <tr>
+               <td><?php $clang->eT("Minimum memory available"); ?></td>
+               <td>64MB</td>
+               <td><?php 
+               if (isset($bMemoryError) && $bMemoryError) { ?><span style='font-weight:bold; color: red'><?php $clang->eT("Outdated"); ?>: <?php echo $this->return_bytes(ini_get('memory_limit'))/1024/1024; ?>MB</span>
+               <?php } else { ?><?php echo $this->return_bytes(ini_get('memory_limit'))/1024/1024; ?>MB <?php } ?></td>
+        </tr>
         <tr>
                <td><?php $clang->eT("PHP PDO driver library"); ?></td>
                <td><?php $clang->eT("At least one installed"); ?></td>