Deep-Linking not working. Only says "View on Web"


#1

I’m using a Photo Twitter Card for pages like this:
http://drawquest.com/p/2e8ou6
But when viewing from an iPad it still only says “View on Web” although I’ve added these tags:

<meta name="twitter:app:url:ipad" content="drawquest://quest/4016631/drawing/4023678"/>
<meta name="twitter:app:name:ipad" content="DrawQuest"/>
<meta name="twitter:app:id:ipad" content="576917425"/>

#2

No one else is seeing this?