To reproduce:
1. Create a new project
2. Import the image effect package
3. Attach an image effect to the main camera (I'm using fisheye)
4. Save the scene
5. Include the scene in the build, build&run for WP8
6. Notice that the screen is black

Sometimes the image effects don't turn the screen black, but don't work either. When used on a project like Angry Bots the effects appeared to work (on the main scene|), but when I created a new scene and added some effects there they did not work.

Regression since 4.5.4p1