Simple Gradient

I had a problem in my work, and am wondering what is wrong here. The filter is a simple gradient, but it seems to be assuming something I can't set. What I want, is a simple 3-color vertical gradient. What I'm getting is a repeating gradient.

--> ffxml here -->

<?xml version="1.0" encoding="utf-8"?>
<Filter>
<Components>
<Result id="result">
<Source source="colorgradient3 01"/>
<FilterType value="0"/>
<Lighting>
<Height value="0.2"/>
<Environment>
<Source value="Church"/>
<Brightness value="1"/>
<Saturation value="1"/>
<Rotation value="0"/>
</Environment>
</Lighting>
</Result>
<ColorGradient3 id="colorgradient3 01">
<Color1 red="0.705426" green="0.583813" blue="0.412866" alpha="1"/>
<Color2 red="0.457364" green="0.304109" blue="0.212728" alpha="1"/>
<Color3 red="0.127907" green="0.0411403" blue="0.0242924" alpha="1"/>
<Position1 value="0"/>
<Position2 value="0.38"/>
<Position3 value="1"/>
<Rotate value="1"/>
<Repeat value="1"/>
<Transition value="0"/>
</ColorGradient3>
</Components>
<Presets>
<DefaultPreset>
<Settings size_factor="1" variation="1" seamless="false" antialiasing="2" map_type="0" edges_only="true"/>
<Lighting>
<Height value="0.2"/>
<Environment>
<Source value="Church"/>
<Brightness value="1"/>
<Saturation value="1"/>
<Rotation value="0"/>
</Environment>
</Lighting>
<Controls/>
</DefaultPreset>
</Presets>

<FilterEditor>
<ThumbnailSize value="1"/>
<Viewport left="0" top="30" zoom_factor="1"/>
<LockPreview>
<Locked value="false"/>
<LockedComponent name=""/>
</LockPreview>
<Item id="colorgradient3 01">
<Position left="150" top="-25"/>


<Position left="-25" top="-25"/>

</FilterEditor>
</Filter>

So in the description for this filter, Should I just suggest the gradient be passed as the input?

I need the gradient to go the full vertical length and the output needs to be a least 1024 x 1024. Since I can't use the internal gradient, would the filter be acceptable if it depends on a gradient from a file as a source image?

Quote
You know the program generates vertical gradients just fine for square images

How funny! In actual life, most of the maps I'll be making are square, so the problem just disappeared. Guess I didn't read this part.