Magento 1.8.0 and 1.8.1 issue with special price

I have fond a bug on Magento CE 1.8.0 and 1.8.1 that is related to special price.

If I set some special price on product and save that change, magento sets current date for Set Product as New from Date (news_from_date), Special Price From Date (special_from_date).

I have solved this issue.

for this issue take standard.php file in your local set up  file is in \app\code\local\Mage\Catalog\Model\Product\Attribute\Backend\standard.php



find the function  _getValueForSave($object)  and add this line,
 $object->setData('news_from_date', FALSE);

 after  if ($startDate == '' && $object->getSpecialPrice()) {

 it means
 if ($startDate == '' && $object->getSpecialPrice()) {
  $object->setData('news_from_date', FALSE);
            $startDate = Mage::app()->getLocale()->date();
        }
 . That's it . Now check.