Index: branches/RC/core/kernel/db/dblist.php
===================================================================
diff -u -r8929 -r9033
--- branches/RC/core/kernel/db/dblist.php	(.../dblist.php)	(revision 8929)
+++ branches/RC/core/kernel/db/dblist.php	(.../dblist.php)	(revision 9033)
@@ -905,6 +905,30 @@
 
 		return $ret;
 	}
+
+	/**
+	 * Set's field error, if pseudo passed not found then create it with message text supplied.
+	 * Don't owerrite existing pseudo translation.
+	 *
+	 * @param string $field
+	 * @param string $pseudo
+	 * @param string $error_label
+	 */
+	function SetError($field, $pseudo, $error_label = null, $error_params = null)
+	{
+		$error_field = isset($this->Fields[$field]['error_field']) ? $this->Fields[$field]['error_field'] : $field;
+		$this->FieldErrors[$error_field]['pseudo'] = $pseudo;
+
+		$var_name = $this->getPrefixSpecial().'_'.$field.'_error';
+		$previous_pseudo = $this->Application->RecallVar($var_name);
+
+		if ($previous_pseudo) {
+			// don't set more then one error on field
+			return ;
+		}
+
+		$this->Application->StoreVar($var_name, $pseudo);
+	}
 }
 
 ?>
\ No newline at end of file