Error in SQL syntax with fast feed views

After updating to the latest dev release (6.x-1.x-dev 20130930), my Fast Feed views are completely broken are broken and I get this error. The current stable release (6.x-1.0-beta13) works OK.

User warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') = ('n')) AND (.uid = 1 ) ORDER BY feeds_data_feed_fast_id DESC LIMIT 0, 10' at line 7 query: SELECT feeds_data_feed_fast.id AS id, feeds_data_feed_fast.url AS feeds_data_feed_fast_url, feeds_data_feed_fast.title AS feeds_data_feed_fast_title, feeds_data_feed_fast.description AS feeds_data_feed_fast_description, feeds_data_feed_fast.id AS feeds_data_feed_fast_id FROM feeds_data_feed_fast feeds_data_feed_fast WHERE ((.field_fast_feed_block_value) = ('n')) AND (.uid = 1 ) ORDER BY feeds_data_feed_fast_id DESC LIMIT 0, 10 in _db_query() (line 169 of /var/www/html/includes/database.mysqli.inc).