Can you please update the load_plugin_textdomain code in your plugin. The It causes major errors with WP_DEBUG is true. That function call should now look like:
load_plugin_textdomain( 'pageList', false, 'pagelist/languages/' );
Without this update the follow error is displayed:
Notice: load_plugin_textdomain was called with an argument that is deprecated since version 2.7 with no alternative available.
And when trying to save a post I get
Warning: Cannot modify header information and a white page.
Thanks!