“All in One SEO Plugin” triggers Warning: call_user_func_array()

After uploaded All in One SEO Pack, I’ve got the following warning, which prevents me from opening up the plugin at page and post level.

Warning: call_user_func_array() [function.call-user-func-array]: First argumented is expected to be a valid callback, ‘Array’ was given in /home/../../wp-includes/plugin.php on line 160

How do I fix the issue? Thanks.