Strange Shadow Rendering with Oculus Runtime 0.7 and Unity 5.1.3p2 Continuing in 5.2.1f1

I recently upgraded to Unity 5.1.3p2 and to Oculus runtime 0.7, along with the newest Nvidia driver 355.84, and since I've been getting this strange shadow rendering behaviour when running with VR enabled in Unity. I thought it might have been due to calibration problems, but re-calibrating using the Oculus utility didn't help. Furthermore, the strange shadow rendering is visible on my monitor as well as on the Rift. See the screenshots for what I mean:
View attachment 153694 ...

Strange Shadow Rendering with Oculus Runtime 0.7 and Unity 5.1.3p2 Continuing in 5.2.1f1