I had an issue with Feedwordpress and WPMU. The feeds were not appearing and neither were they syndicating posts. Also when I added and deleted blog links they were still appearing.

I tried removing everything including plugins and upgrading to the latest MU Wordpress but Feedwordpress 0.992 only started working properly after I removed the object cache in wp-config.php.

Remove the following line from wp-config.php:

define('ENABLE_CACHE', true);

Delete the folder /wp-content/cache/.