Gaps everywhere, the plane has Use Margin enabled and is set to 0.762 cm the Pills Use margin is on and set to 1.27 cm and the Project/Dynamics/Expert/Collision Margin is still set to 1cm.
You can turn off the Use Margins in the Dynamics tags and set the Collision Margin to 0 and it will work. I had to set Steps per Frame to 20 and Maximum Solver Iterations Per Step to 20 to get no penetration of the floor by the pills.
Or you can set Collision Margin to 0.1cm and then Steps per frame and Max Solver Iterations both to 10 and that works (still having Use Margin in both Dynamics Tags turned off)