Oops... fixed the fix I just fixed...
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 42ce433..427e62f 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -701,7 +701,7 @@
 			}

 			else

 			{

-				return $label;

+				return $fieldname;

 			}

 		}