Magento

The 1.3 update actually worked great for me for once...lol There is an issue with the USPS flat rate box however - I still cannot use that option - Anyone else with the same issue? Mine just tells me the option is unavailable- it was the same in the last 1.2.0 version....

Same here. Priority Mail Flat-Rate Box does not show up in frontend as a shipping option. I’ve tried several configurations in the backend with no luck.

Any ideas?

EDIT: Found a fix here:

http://www.magentocommerce.com/boards/viewthread/33355/

This problem has been around for a few releases now - This is a very simple issue that should have been resolved a few releases ago. I have seen a few different posts about it not working correctly.

Even if the USPS flat rate boxes are showing up as a shipping option, Magento still might display a box size that the items in the cart don’t fit! Therefore, many retailers are forced to disable flat rate boxes or use other shipping methods as an alternative, despite the considerable savings of using USPS flat rate boxes.

If you or a client want to display cheaper, more accurate shipping rates to customers, we offer an extension that solves this problem. Using USPS flat rate boxes successfully as a shipping method means either a) creating complicated business rules that approximate the cost for you, or b) using an extension that automatically figures out if the goods in a customer’s cart fit into one of the flat rate boxes. To make things simple for retailers, our extension does the latter, always ensuring that the right flat rate box is displayed to customers.

Do the math and check out our USPS Flat Rate Box extension on Magento Connect. We’ll be happy to help you!