I created a website that announced the launch of a small mobile app for both iOS and Android platforms. I was told by Apple that my app would not be approved as long as I had links to competitors (i.e. Android) on the web site.
Needless to say, the full list of platforms Angry Birds runs on is (according to Wikipedia) much bigger.
It was the first app launch, and we prominently showed an iPhone and a Nexus side by side with our app. Whoever reviewed our app didn't like that, so we took the Nexus image down.
We probably could have just posted the old design back up after the app got approved, but the company didn't last very long past that.