Index: trunk/core/kernel/utility/formatters/unit_formatter.php
===================================================================
diff -u -N -r7635 -r8402
--- trunk/core/kernel/utility/formatters/unit_formatter.php	(.../unit_formatter.php)	(revision 7635)
+++ trunk/core/kernel/utility/formatters/unit_formatter.php	(.../unit_formatter.php)	(revision 8402)
@@ -29,6 +29,7 @@
 	{
 		if( !isset($options['master_field']) )
 		{
+			if ($value == -1) return; // for infinity setting, otherwise infinity is incorrectly converted back to Kg
 			$regional =& $this->Application->recallObject('lang.current');
 			switch( $regional->GetDBField('UnitSystem') )
 			{