Was Saving some presets in the Shader Variance Editor and when I went to save I kept getting this "out of range" message when my settings were not out of range. You can see it on the image I linked to. Then reopening the saved the shader shows an altered setting.
This happens for several shaders including Noise Factory, Marble, Scratches, Parquet.
Using EI9.1 and Mavericks.
https://dl.dropboxusercontent.com/u/5048027/shader.png