To Reproduce:
1. Open the project and build the Linux executable.
2. The script attached to the camera will save a screenshot, using the Screen Rect.
3. To run the app, use this command:

./testLinux.x86_64 -batchmode -screen-width 1024 -screen-height 768

4. A screenshot is saved after 30 frames, next to the app binary.

Based on the command line args in the docs, the "1024" and "768" parameters should set up the Screen to be of that resolution : http://docs.unity3d.com/Documentation/Manual/CommandLineArguments.html

BUG: The screenshot is always 640x480.