I've been trying to add some generic passbook cards from passsource.com or ipass.pk to store frequent flier numbers and stuff like that. I thought that would be a good use for passbook since nobody seems to support it for storing frequent flier numbers yet (only boarding passes and only some airlines). Anyways, when I create a card on any of these sites, and the card appears in Safari and I click "add to passbook" it doesn't do anything (the card never appears in passbook). If I email the card to myself, and open it on my iPhone, a preview of the card shows up but when I click add, it just goes away and never appears in passbook. Has anybody noticed this problem? Is anybody else having trouble adding 3rd party cards? By the way I successfully added a Walgreens card via the Walgreens app without any trouble, and I added a United boarding pass via the United website no problem. It's just the 3rd party cards from websites which aren't working for me.