Problem: On some platforms drawing of lines in OpenGL may use an optimization technique that avoids drawing of the last pixel. This is most noticeable for text drawn in the work area as some characters will appear to be missing the finalstroke of the pen.
Solution: Add the following commands to your Tecplot configuration file (tecplot.cfg):
$!Interface openglconfig {screenrendering {DoExtraDrawForLastPixel = TRUE}}
{imagerendering {DoExtraDrawForLastPixel = TRUE}}