Android-SDK r17 ruins working projects

Question

I have updated my android-sdk-package from r16 to r17. I have updated the Eclipse ADT-Plugin too.
My project worked perfectly fine with r16 (android-sdk r16 and Eclipse

Answer 1

This topic is also being discussed at the android-developers forum. The magic recipe that worked for me was this: In addition to re-homing included libraries, I had to change my target SDK in Project Properties away from 4.0.3 and back again. That fixed it.