I don't know if this effects Able or not, but Web2Market got this email from the USPS:
There will be several changes implemented in Web Tools by November 17, 2008. While the APIs will remain structurally and syntactically backward compatible, changes are possibly substantial enough to affect some users. Please contact icustomercare@usps.com (1-800-344-7779) with any specific schema or enumeration changes.
• Effective September 2008, Bound Printed Matter is no longer a valid service type for all versions of the Delivery Confirmation, Delivery Confirmation PIC, Signature Confirmation, and Signature Confirmation PIC APIs. On November 14, 2008, Web Tools will return an error document instead of a successful label response as shown below:
EFFECTIVE 11/14/2008 PRIOR TO 11/14/2008
<DeliveryConfirmPICCertifyV3.0Request USERID="xxx">
<FromZip5>20770</FromZip5>
<ToZip5>06371</ToZip5>
<ServiceType>Bound Printed Matter</ServiceType>
</DeliveryConfirmPICCertifyV3.0Request>
<?xml version="1.0"?>
<Error>
<Number>-2147218882</Number>
<Source>DC_Respond.DelivConfirmV3:clsDeliveryConfirmationV3.0.ProcessDCRequest; SOLServerConfrm.DC_Respond</Source>
<Description>Effective September 2008, Bound Printer Matter is no longer a valid service type for this API. (BPM is restricted to labels with Permit Imprint.)</Description>
<HelpFile/>
<HelpContext>1000440</HelpContext>
</Error>
<?xml version="1.0"?>
<DeliveryConfirmPICCertifyV3.0Response>
<DeliveryConfirmationNumber>420063719102038555749874163074</DeliveryConfirmationNumber>
</DeliveryConfirmPICCertifyV3.0Response>