xmaxima's default window geometry in Kubuntu Linux

Hi,

I downloaded Xmaxima from the repositories for
Kubuntu, and I'm having a problem with the default
window geometry  that xmaxima outputs to gnuplot. A
circle comes out as an ellipse. I know it is not my
default geometries that are the culprit - other
plotting utilities will plot a circle as a circle.
Anyone have any experience with this problem? 

Thanks

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