I've tried this on both Zen and Flex. Selecting the Facebook (share) button on an asset launches Facebook in my browser on my iPhone.
Is it possible the Facebook button can recognize my Facebook mobile app instead? The Twitter (share) button does. I think on Android a user is given the option to continue in the browser or launch their Facebook app. Or is this just me and I'm late to the party? Is it up to the individual user?
I would think this would improve the mobile experience for many users--making it fast and efficient to share content. On mobile--I hit the login option to Facebook and abandoned my attempt to share.
Customer support service by UserEcho