What sort of bugs? I don't think it was working on Android in 3.5.
On Android and iOS the test ads works
But I had to replace all the unity extension blocks in the scenes of my project.
The bug I found that if I do "clean project" and sometimes even without doing it, when I build the game, all the unity blocks give error and the build fails.
The solution that i've found, after hours of testing, is to go into the manager extension and disable and re-enable the extension manager and the extension of unity.