Some WarpPlugin parts have two hardcoded TweakScale definitions like this one:

	MODULE
	{
		name = TweakScale
		defaultScale = 5
		type = stack_interstellar_225
		scaleFactors = 1.25, 1.875, 2.5, 3.75, 5, 10, 15, 20, 30, 40
	}
	MODULE
	{
		name = TweakScale
		type = surface_flat
	}

What's clearly a mistake.

The parts affected are:

• CircularThermophotovoltaicReceiver
• CircularUltravioletPhotovoltaicReceiver

Being both parts surface attached, I think the second TweakScale module should prevail.

I'm issuing a pull request with the fix, but I'm unsure if it should be applied bluntly - any current savegame using these parts would be incompatible with the new (correct) definition.