Forum page breaks with a fatal error when activated

I don't have time to review the code right now, so I figured I'd at least share it for the community to review...
www.sunyatastudios.net/forum/

Fatal error: Call to undefined function: theme_forum_submitted() in /home/loftk3/public_html/sunyatastudios/modules/advanced_forum/advanced_forum.module on line 422