I'm running the latest 2.8.2 WP and I just updated the Joost GA plugin to 3.0 but getting this error...
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'GA_Admin::add_config_page' was given in /home/mysite/public_html/mysite/wp-includes/plugin.php on line 339
Also, the tab/link to the GA settings page is gone.
Thanks