Currently we use Jade 6.3.04 but have tried 6.3.05 also with the same issue. When a delta is set, and we have an overridden method checked out in the sub class AND base class, then any inheritMethod calls from the sub class version do not call the checked out version of the base class method, rather they appear to call the non delta version. We have found this to be the case with the load method in a form and sub form scenario.
Any thoughts on this?