rss cache Joomla 2.5

2) Open the file factory.php in notepad
3) Look for function getFeedParse – starts on line ~345:
public static function getFeedParser($url, $cache_time = 0)
4) Replace the entire function with an expression:

public static function getFeedParser($url, $cache_time = 0)
{
jimport(‘simplepie.simplepie’);

$cache = self::getCache(‘feed_parser’, ”);

if($simplepie = $cache->get($url)){
return $simplepie;
}else{
$simplepie = new SimplePie(null, null, 0);

$simplepie->enable_cache(false);
$simplepie->set_feed_url($url);
$simplepie->force_feed(true);
$simplepie->init();

if ($cache_time > 0)
{
$cache->setLifeTime($cache_time);
$cache->store($simplepie, $url);
}

return $simplepie;
}
}
5) Enjoying life %)

I found the treatment here) 

As I understand it, the error is due to a crooked auto-update old versions of Joomla, so it is not so widespread.