[kiklop74]

Here is an example where feed mixing works:

class AdvancedUserRecipe1264626029(BasicNewsRecipe):
    title          = u'Somenews'
    oldest_article = 7
    max_articles_per_feed = 100
    use_embedded_content  = True
    encoding              = 'utf8'
    
    feeds          = [  
                        (u'Kindle World', u'http://feeds2.feedburner.com/AKindleWorld')
                      , (u'Dilbert RSS', u'http://feeds.feedburner.com/DilbertDailyStrip')
                     ]