When placing a ContainerView inside a TabBarController (or at least a ViewController inside the TabBarController), the resulting ContainerView will display wrong layout guides in the iOS storyboard designer. It looks like the Containerview is inheriting the top and bottom guides of its parent, which has a bottom bar with the TabBarItem in it. But the ContainerView does not need this bottom bar since it's a seperate view... and it's pretty annoying having to design the childview with this bar in the way. Oh, and XCode does show it correctly.
Some screens to explain my problem:
in Xamarin Studio