line 46 – wp-content/plugins/simple-press/sp-startup/sp-load-site.php
Should be commented out for now?
add_action('wp_head','sp_load_blog_support');
causes php fatal error as sp_load_blog_support calls undefined sp_blog_links_control().
Got forum page to load for first time by commenting out. Grepping source showed other occurences of sp_load_blog_support commented out. Perhaps this one was missed?