**System Information**
Windows 8.1 x64
Renderer: GeForce GTX 860M/PCIe/SSE2
Vendor: NVIDIA Corporation
Version: 4.4.0
**Blender Version**
Broken: 2.71.1 83f5d41
**Short description of error**
Color Correction node affect Alpha channel (or something, I'm not really sure)
**Exact steps for others to reproduce the error**
# Open blend file {F97464}
# Hit Render and look how brightened the compositor output is
# Then enable Convert Premul option of Alpha Over node, and now output looks like it should be: only cube is brightened
# You can try the Mix node with Include Alpha option, it looks the same
There are only 4 sliders that cause this misbehave of Color Correction node:
- Contrast Master
- Contrast Shadows
- Lift Master
- Lift Shadows