Symptoms
When retrieving Real Time Shipping methods from USPS, there is HTML showing in the returned rates such as: <sup>®</sup>
This also causes an error when selecting one these returned rates, such as: A potentially dangerous Request.Form value was detected from the client (ShippingMethodID="...Class Mail<sup>®</sup> Int...")
Cause
USPS has added the registered trademark to their returned rates. This was only for International addresses at one time but was added around 01/22/2012 for Domestic rates as well, causing issues with all returned USPS rates in older versions of the software (8.0.1.2 and 9.0.1.3SP1A and earlier).
Solution
For versions: 8.0.1.2 and 9.0.1.3SP1 ONLY go to
THIS PAGE and follow the instructions.
NOTE: If you have customized source code, check with your developer before applying this patch.