diff --git a/app/code/core/Mage/Core/Model/Resource/Abstract.php b/app/code/core/Mage/Core/Model/Resource/Abstract.php
index d3e5b917ccf..652f7ec45b8 100644
--- a/app/code/core/Mage/Core/Model/Resource/Abstract.php
+++ b/app/code/core/Mage/Core/Model/Resource/Abstract.php
@@ -230,9 +230,8 @@ protected function _prepareDataForTable(Varien_Object $object, $table)
      */
     protected function _prepareTableValueForSave($value, $type)
     {
-        $type = strtolower($type);
         if ($type == 'decimal' || $type == 'numeric' || $type == 'float') {
-            $value = Mage::app()->getLocale()->getNumber($value);
+            return Mage::app()->getLocale()->getNumber($value);
         }
         return $value;
     }
diff --git a/lib/Varien/Db/Adapter/Pdo/Mysql.php b/lib/Varien/Db/Adapter/Pdo/Mysql.php
index 18e468321ed..ac068ea69af 100644
--- a/lib/Varien/Db/Adapter/Pdo/Mysql.php
+++ b/lib/Varien/Db/Adapter/Pdo/Mysql.php
@@ -3008,8 +3008,8 @@ public function prepareSqlCondition($fieldName, $condition)
      */
     protected function _prepareQuotedSqlCondition($text, $value, $fieldName)
     {
-      $text = str_replace('{{fieldName}}', $fieldName, $text);
-      return $this->quoteInto($text, $value);
+        $sql = $this->quoteInto($text, str_replace("\0", '', $value));
+        return str_replace('{{fieldName}}', $fieldName, $sql);
     }
 
     /**
@@ -3023,7 +3023,7 @@ protected function _prepareQuotedSqlCondition($text, $value, $fieldName)
      */
     protected function _transformStringSqlCondition($conditionKey, $value)
     {
-        $value = (string) $value;
+        $value = str_replace("\0", '', (string) $value);
         if ($value == '') {
             return ($conditionKey == 'seq') ? 'null' : 'notnull';
         } else {
@@ -3098,7 +3098,7 @@ public function prepareColumnValue(array $column, $value)
             case 'mediumtext':
             case 'text':
             case 'longtext':
-                $value  = (string)$value;
+                $value  = str_replace("\0", '', (string)$value);
                 if ($column['NULLABLE'] && $value == '') {
                     $value = null;
                 }