I'm having a dickens of a time getting Xamarin Studio to see that I've made changes in any of my Xcode projects/.xibs.
It usually includes, making a change in a .xib, saving, completely quitting Xcode, cleaning the Xamarin project, doing a full rebuild, launching the app as a demo in simulator, quitting the app in simulator, then Xamarin Studio sees the change and imports the updates from Xcode.
I almost always have to go through the above steps and its that way in all of my solutions.
Do you think you could add a menu option under Project to force Xamarin to reread the Xcode project??