I actually upgraded GP to 2.0.2 and have encountered the following on my site.
“Warning: call_user_func_array() expects parameter 1 to be a valid callback, no array or string given in /homepages/33/d91710804/htdocs/clickandbuilds/familiekoecknet/wp-content/plugins/if-menu/if-menu.php on line 116
Warning: call_user_func_array() expects parameter 1 to be a valid callback, no array or string given in /homepages/33/d91710804/htdocs/clickandbuilds/familiekoecknet/wp-content/plugins/if-menu/if-menu.php on line 116”