I have updated a sample test application in BlackBerry Vendor portal to test the in app purchase and I hold the application in draft. Now when I check with my BlackBerry Playbook to get the sample application, I get an "internal server error".
I've read "How To: Live Testing the Payment SDK with PlayBook Applications", and I used http://appworld.blackberry.com/webstore/content/myblackberryid to open the sample application in my playbook.