$vbulletin->options not available at global_bootstrap_complete unless via include?!

[kh99]

The global_bootstrap_complete hook is called from inside a function (line 87 of class_bootstrap.php, if you want to se where), and there is no "global $vbulletin;" in that function, so $vbulletin isn't defined at that hook. Your function works because you do have the global statement. If you put "global $vbulletin;" in your plugin code it should work.