I updated this plugin in 3.3. It created a conflict in my wp-config file when I activated the XML Sitemaps. I contacted Yoast about it to let him know man to man that it was breaking things. I didn't want to make a big deal of it. He had previously deleted my other mailings, but this time he denied it and cursed me out. I can forward the e-mail. Please don't support this plugin or author.