The issue here is because of a bug in robotium that was fixed after the latest release. The issue in question is https://code.google.com/p/robotium/issues/detail?id=550
The latest code on github does have this fix in (see here, so you could package the source yourself and use that as the latest version otherwise you are going to have to implement some methods that have the same functionality as that changed.
Edit Robotium 5.0.1 is now available and should have the above fix in it.