In a multisite installation, the plugin generated 348 characters of unexpected output during activation on a single site.
Also with WP_DEBUG, on the post-new screen, it generated this notice:
Notice: Undefined variable: enabled in /HOME/USERNAME/public_html/wp-content/plugins/post-expirator/post-expirator.php on line 196
When I try to save a post, I get the white screen of death and these notices:
Notice: Undefined index: expirationdate_category in /HOME/USERNAME/public_html/wp-content/plugins/post-expirator/post-expirator.php on line 338
Notice: Undefined index: expirationdate_category in /HOME/USERNAME//public_html/wp-content/plugins/post-expirator/post-expirator.php on line 338
Warning: Cannot modify header information - headers already sent by (output started at /HOME/USERNAME/public_html/wp-content/plugins/post-expirator/post-expirator.php:338) in /HOME/USERNAME/public_html/wp-includes/pluggable.php on line 881