Index: units/email_events/email_events_config.php
===================================================================
--- units/email_events/email_events_config.php	(revision 13756)
+++ units/email_events/email_events_config.php	(working copy)
@@ -196,7 +196,7 @@
             	'not_null' => 1, 'required' => 1, 'default' => 'Core'
             ),
 
-            'Description' => Array ('type' => 'string', 'not_null' => 1, 'default' => ''),
+            'Description' => Array ('type' => 'string', 'default' => NULL),
 
             'Type' => Array (
             	'type' => 'int',
Index: units/images/images_config.php
===================================================================
--- units/images/images_config.php	(revision 13756)
+++ units/images/images_config.php	(working copy)
@@ -146,8 +146,8 @@
 						'Priority' => Array('type' => 'int', 'default' => 0, 'not_null'=>1),
 						'ThumbPath' => Array(
 							'type' => 'string', 'formatter' => 'kPictureFormatter',
-							'skip_empty' => 1, 'max_len' => 240, 'default' => '',
-							'not_null' => 1, 'include_path' => 1,
+							'skip_empty' => 1, 'max_len' => 240, 'default' => NULL,
+							'include_path' => 1,
 							'allowed_types' => Array(
 								'image/jpeg', 'image/pjpeg', 'image/png',
 								'image/x-png', 'image/gif', 'image/bmp'