rosoft2001how to reproduce:
install only wordpress-2.8.4.zip postgroups.1.2.0.zip with default options. Go to "Post Groups" page and click "Save Changes"
you get "Cannot modify header information - headers already sent by (output started at c:\proiecte\wordpress\wp-admin\admin-header.php:18) in c:\proiecte\wordpress\wp-includes\pluggable.php on line 865"
The line with the problem is in post_groups.php line 928:
wp_redirect($redirectUrl);
I replace it with
?><SCRIPT language="JavaScript">
<!--
window.location="<?=$redirectUrl?>";
//-->
</SCRIPT><?
but should be a better solution.
