I've encountered a strange problem with the Double Slider control. It's in a fairly large VS project, and the problem seems to be confined to the single control, so for now I'll just show the relevant lines. The only code that's changed from when it seemed to work correctly is the precision in configure code.
The add code is:
props.Add(new DoubleProperty(PropertyNames.TexHeightScale, 10, 0, 255));
The configure code is: