[PLUGIN] Google Sitemap Generator - for Clipper
New releases of Clipper use new WP
feature which is "custom post statuses", and most popular plugins to generate sitemaps still have "hardcoded" public visible post status (publish)... so 'unreliable' coupons are not included into sitemap.
Use get_post_stati() to get list/array of public visible post statuses
Ticket logged: http://plugins.trac.wordpress.org/ticket/1495
Download modified version of "Google Sitemap Generator"