[Plugin: Google XML Sitemaps] Beta 7 broken on WordPress 3.3

Navigating to sitemap.xml gives the following error (identifying information replaced with . . . ):

Warning: Invalid argument supplied for foreach() in / . . . /wp-includes/query.php on line 2746

Warning: Cannot modify header information – headers already sent by (output started at / . . . /wp-includes/query.php:2746) in / . . . /wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 1577

http://wordpress.org/extend/plugins/google-sitemap-generator/