rem: walletService.WALLET_Prefill(false, window._content); 
add: walletService.WALLET_Prefill(false, window.content); 
context:     function formPrefill() {      var walletService = Components.classes["@mozilla.org/wallet/wallet-service;1"].getService(Components.interfaces.nsIWalletService);      try {        walletService.WALLET_Prefill(false, window._content);        window.openDialog("chrome://communicator/content/wallet/WalletPreview.xul",                          "_blank", "chrome,modal=yes,dialog=yes,all, width=504, height=436");      } catch(e) {      }    }
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/68fdfc1c8a8572294071ade1d9a75ca9c9478889/walletOverlay.js/buggy/extensions/wallet/resources/content/walletOverlay.js