iOS Phonegap returning weird purchase receipts
===

I've been seeing several purchase attempts from my Phonegap iOS app with this odd transaction receipt, which appears to be invalid when I try to verify it at the itunes endpoint.

    window.plugins.inAppPurchaseManager.onPurchased = function (transactionId, productId, receipt) {
      // receipt is MC4wMDAwMDA= which base64 decodes to 0.000000
    }

I'm suspecting a hack, but I want to verify that we aren't doing anything wrong.

This is using the official InAppPurchaseManager plugin from the phonegap-plugins repo on Cordova 1.7.