Quote by ethereal1: I don't understand, Blaine said to Enable PHP Register_Globals, and you're saying to turn them off? Which is it?
Sorry, it should be "on" (Note to self: Don't reply to forum posts when you're already halfway out through the door ...).
Use the file admin/install/info.php or just create a new one containing only the line
PHP Formatted Code<
php phpinfo(); ?>
and check that it really says that register_globals is "on".
Geeklog itself now works with register_globals=off, but many plugins (especially the ones you mention) still require it to be "on".
Oh, and since you're on PHP 5, also ensure that register_long_arrays is "on" (same reason here - Geeklog itself will work, many plugins won't).