v1.8 Assigning a discount to a product where the customer enters their own price does not seem to work

I have been playing with this feature for about two hours and have decided it is a possible bug.

I set up a product (gift card) where the customer can enter their own price ($25-$1000).  I then went to create a discount, set it to:

- Discount type: Assigned to product variants (SKUs)
- Discount Requirement: none
- Discount limitation: Unlimited
- Name: my name
- Use percentage: not checked
- Discount Amount: 10
- Start Date: today
- End Date: today
- Requires Coupon Code: Not checked

I then went to my product SKU and selected the discount.  When I added that item to my cart, the discount did not appear.  I tried changing it to a percentage.  That didn't work.  I tried adding a coupon code, that didn't work.

I then went in and created a another product (Gift Card) and set the price to $100.  I applied the same discount to that SKU, and the discount is taken in the cart.

Please let me know if I can provide more info.

bug exists 1.9 too - just discovered it (when I least needed it!!)

seems it is by design, just found this line in PriceHelper.cs

//we don't apply discounts to products with price entered by a customer

shame about that, a quick fix would be great if anyone could manage that for 1.9 ??