FeedsMissingPlugin::parse()

Hello,

i put up the latest dev. using update.php and try cron run after this. this brings me a blank site with this msg

Fatal error: Call to undefined method FeedsMissingPlugin::parse() in ./all/modules/feeds/includes/FeedsSource.inc on line 354

i dont use feeds ...but i try to learn, thats why i update to the latest dev