[vtkusers] Distorted characters when justification is centered. HELP

[Oliver Kania]

We sometimes get distortions like in the attached image when we
set the justification of fonds to centered. This happens both with
scaled and non scaled fonts, but I think only if the font size is less than
15 or something.
Here is some example code :

vtkTextActor* m_textActTop = vtkTextActor::New();
.....

m_textActTop->SetTextScaleModeToViewport();
m_textActTop->GetTextProperty()->SetJustificationToCentered();
m_textActTop->GetTextProperty()->SetFontSize(12);
m_textActTop->SetNonLinearFontScale(0.1,12);
m_textActTop->GetTextProperty()->SetFontFamilyToArial();

Any help would be greatly appreciated.
Oliver
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