If you read Magento Blog and Magento News from time to time, you definitely noticed the latest August/September update. Magento featured five Magento Enterprise merchants with the ingredients for success and mentioned our client there (check our Magento portfolio).See more
On January 2th, 2011 USPS updated domestic shipping services and international pricing and product features. These changes to their API have affected the live shipping rates in all Magento versions.
Here is the instruction how to fix this problem for versions Community, Pro & Enterprise.See more