Fulfillment Set (Unchecked) when Ship-to Changed

 Hi,

We are seeing a small issue on the sales order form. We enter sales orders with fulfillment set (checkbox) selected on the order. After entering the lines, when the ship-to on the order header is changed, the fulfillment set (checkbox) is unchecked automatically. We don't have any defaulting rule on the field/attribute 'Fullfiment Set'. We tried to disable the dependency between G__SHIP_TO_ORG and G_DEFAULT_FULFILLMENT_SET or G_FULFILLMENT_SET_NAME, but it dint help/work. Looks like a bug to me. Has any body faced this?

Thanks,
Nitin jain