Has anybody had any luck getting this discount applied to an existing pre-order?

When I contacted the customer service number yesterday, I was first told that it didn't apply to the N900 (which was resolved by walking them an order using the code) and then that it couldn't be applied retrospectively to orders, and so I would have to cancel and reorder. As I have an order from early last month I'm not keen to do this and slip down the pre-order queue!

Nokia's sales terms for pre-orders state:

Whenever you pre-order anything from the Online Shop the price we charge when we ship it to you will be the lowest price offered by Nokia between the time you placed your order and the date when your order is shipped by Nokia.

This would seem to suggest the offer price should apply, but given my experience yesterday not everybody appears to agree.