**System Information**
Win7/64, AMD HD 6850
**Blender Version**
all (testable since 2.57)
**Short description of error**
see title
**Exact steps for others to reproduce the error**
Open {F85796} and start rendering. During rendering - you might have to be quick - switch the "[x] Color" checkbox in the "Influence" section of the texture properties on and off. You see it influences the active rendering process. It could be considered a feature - but I don't think this is intended behavior as I've never experienced that a modification after starting rendering influences the render result. The Color value is only one example that I've noticed.