Index: branches/5.0.x/core/kernel/db/dbitem.php
===================================================================
diff -u -N -r13257 -r13338
--- branches/5.0.x/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 13257)
+++ branches/5.0.x/core/kernel/db/dbitem.php	(.../dbitem.php)	(revision 13338)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: dbitem.php 13257 2010-03-17 10:33:37Z alex $
+* @version	$Id: dbitem.php 13338 2010-04-06 08:11:57Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -226,7 +226,7 @@
 				$this->FieldErrors[$error_field]['value'] = $error_params['value'];
 				unset($error_params['value']);
 			}
-			
+
 			// additional params, that helps to determine error sources
 			$this->FieldErrors[$error_field]['params'] = $error_params;
 		}
@@ -450,7 +450,15 @@
 
 		// 2. don't write empty field value to db, when "skip_empty" option is set
 		$field_value = array_key_exists($field_name, $this->FieldValues) ? $this->FieldValues[$field_name] : false;
-		$skip_empty = array_key_exists('skip_empty', $this->Fields[$field_name]) ? $this->Fields[$field_name]['skip_empty'] : false;
+
+		if (array_key_exists($field_name, $this->Fields)) {
+			$skip_empty = array_key_exists('skip_empty', $this->Fields[$field_name]) ? $this->Fields[$field_name]['skip_empty'] : false;
+		}
+		else {
+			// field found in database, but not declared in unit config
+			$skip_empty = false;
+		}
+
 		$skip = $skip || (!$field_value && $skip_empty);
 
 		// 3. skipping field not in Fields (nor virtual, nor real)