Index: admin_tag_processor.php
===================================================================
--- admin_tag_processor.php	(revision 14103)
+++ admin_tag_processor.php	(working copy)
@@ -248,7 +248,7 @@
 					continue;
 				}
 				else {
-					$show_mode = $section_data['show_mode'];
+					$show_mode = isset($section_data['show_mode']) ? $section_data['show_mode'] : smNORMAL;
 					$section_data['debug_only'] = ($show_mode == smDEBUG) || ($show_mode == smSUPER_ADMIN) ? 1 : 0;
 				}