It looks like they have moved the contact phone outside of the payerinfo in the xml.
Update line 35 of pp_confirm from:
$PPVals["Phone_Number"] = WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->ContactPhone");
to:
$PPVals["Phone_Number"] = WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "ContactPhone");
and see if that fixes the problem.