When using a TabbedPage (included in a NavigationPage) in Windows Phone WinRT project the tab header consumes a lot of space on the page. It seems both the NavigationPage and TabbedPage add some extra Padding. Manually changing the padding for both pages doesn't seem to have any impact.
In Xamarin.Forms WinRT writing a custom renderer for the TabbedPage doesn't seem possible (missing virtual keyword on baseclass, so override not possible).
Xamarin.Forms for WinPhone Silverlight doesn't have the above described issues and does have the possibility to write an custom renderer.
Any ideas how to fix this for Windows RT ??