We have enhanced the functionality of the two Saturday services we support, i.e., UPS Next Day Saturday Delivery and Fedex Priority Overnight Saturday Delivery. Previously, if you had either of these services enabled in your AuctionInc account (or requested a rating for them in our API) then AuctionInc would return a rate for them, regardless of it really made sense in terms of timing. Now, these rates will only be returned if the rate is requested on Thursdays or Fridays. This should, we hope, make these ratings more useful to you to consider enabling if you sell the type of items where customers ordering towards the end of the week might indeed want to pay the extra fee.