**System Information**
Windows 7 Enterprise 64-bit
Nvidia Quatro 600
**Blender Version**
Broken: (example: 2.69.0 r60995)
**Short description of error**
While rendering an animation, if the resolution scale slider under scene setting is changed, blender promptly crashes.
**Exact steps for others to reproduce the error**
1) Render an animation.
2) While render is processing, change the resolution scale.