Everything worked fine with this plugin UNTIL 1.4!
By updateing it, the whole blog crashes and shows only an error message in back- and frontend:
Warning: Cannot modify header information - headers already sent by (output started at /homepages/25/d13574424/htdocs/v8/blog/wp-content/plugins/advanced-category-excluder/ace-widgets.php:14) in /homepages/25/d13574424/htdocs/v8/blog/wp-includes/pluggable.php on line 850
There seems to be a problem between
ace-widgets.php --> line 14
wp-includes/pluggable.php --> line 850