How do iPhone apps Instagram/DailyBooth/Path implement large center tab buttons?

[boctor]

http://idevrecipes.com/2010/12/16/raised-center-tab-bar-button

[Void_]

Please stop that snowing :-/

[boctor → Void_]

OK, enough people have asked, so the snowing is gone...

[tomelders → Void_]

Who killed Christmas? Was it you?... I liked it.

[danw]

That's lovely apart from the fact that having a camera button is inconsistent with tab navigation.

[gte910h → danw]

Tab navigation is sometimes inconsistant with the greater purpose of an app. You need some tabs, but also something else sometimes.

[uptown → danw]

Think different.