Index: trunk/core/kernel/db/dblist.php
===================================================================
diff -u -N -r2737 -r2761
--- trunk/core/kernel/db/dblist.php	(.../dblist.php)	(revision 2737)
+++ trunk/core/kernel/db/dblist.php	(.../dblist.php)	(revision 2761)
@@ -337,8 +337,14 @@
 			$totals = getArrayValue($field_options, 'totals');
 			if(!$totals) continue;
 			
-			$field_expression = isset($this->CalculatedFields[$field_name]) ? $this->CalculatedFields[$field_name] : '`'.$this->TableName.'`.`'.$field_name.'`';
-			$fields[$field_name] = $totals.'('.$field_expression.') AS '.$field_name.'_'.$totals;
+			$calculated_field = isset($this->CalculatedFields[$field_name]) && isset($this->VirtualFields[$field_name]);
+			$db_field = !isset($this->VirtualFields[$field_name]);
+			
+			if($calculated_field || $db_field)
+			{
+				$field_expression = $calculated_field ? $this->CalculatedFields[$field_name] : '`'.$this->TableName.'`.`'.$field_name.'`';
+				$fields[$field_name] = $totals.'('.$field_expression.') AS '.$field_name.'_'.$totals;
+			}
 		}
 		
 		if(!$fields) return false;