TURN ON WP_DEBUG

I agree.

Below a patch for some Notice fixes:

diff --git a/httpdocs/wp-content/plugins/wp-page-widget/wp-page-widgets.php b/httpdocs/wp-content/plugins/wp-page-widget/wp-page-widgets.php
index 2c6a2cf..50c0e7d 100644
--- a/httpdocs/wp-content/plugins/wp-page-widget/wp-page-widgets.php
+++ b/httpdocs/wp-content/plugins/wp-page-widget/wp-page-widgets.php
@@ -444,7 +444,7 @@ function pw_metabox_content($post) {
 	</div>

 	<div style="padding: 5px;">

-	<!--	<a id="pw-button-customize" class="<?php echo $pw_class ?>" href="#"><span class="customize">Customize</span><span class="default">Default</span></a>-->

+<?php /*		<a id="pw-button-customize" class="<?php echo $pw_class ?>" href="#"><span class="customize">Customize</span><span class="default">Default</span></a> */ ?>

 		<input type="radio" class="pw-toggle-customize" name="pw-customize-sidebars" value="no" <?php checked($customize, 'no') ?> /> Default (follow <a href="<?php echo admin_url('widgets.php') ?>">Widgets settings</a>)

 		&nbsp;&nbsp;&nbsp;<input class="pw-toggle-customize" type="radio" name="pw-customize-sidebars" value="yes" <?php checked($customize, 'yes') ?> /> Customize

 		<br class="clear" />

@@ -776,10 +776,10 @@ function pw_ajax_toggle_customize() {
 	$status = stripslashes($_POST['pw-customize-sidebars']);

 	$post_id = (int) $_POST['post_id'];

-	$search_page = $_POST['search_page'];

+	$search_page = ( isset( $_POST['search_page'] ) ? $_POST['search_page'] : '' );

-	$tag_id = (int) $_POST['tag_id'];

-	$taxonomy = $_POST['taxonomy'];

+	$tag_id = ( isset( $_POST['tag_id'] ) ? (int) $_POST['tag_id'] : 0 );

+	$taxonomy = ( isset( $_POST['taxonomy'] ) ? $_POST['taxonomy'] : '' );

 	if (!in_array($status, array('yes', 'no')))

 		$status = 'no';