As I said previously (and as I now confirm after more experimentation), I'm not able to detect any missing pixels in gretl-gnuplot PNG plots on Linux (this is using the pngcairo terminal with gnuplot 4.3 CVS).
But I've now done some testing on Windows (Vista) and can see a little clipping of text here and there, partly depending on the font selected. For example, I run a trimmed version of the script I cited earlier: nulldata 300 series s = normal() gfoo <- gnuplot s time -o {set ylabel "My Y Label";} gfoo.show When using the Verdana font at 8 points, there's a slight glitch in the "150" tic-mark on the x-axis: the right extremity of the '0' in "150" is missing. This corrects itself if I choose Verdana 9 or Tahoma 8. Then if I add a title at the top of the graph including the letter 'Q', the tail of the Q is truncated (the last row of pixels seems to be lopped off). I'm not sure if this is really worth bothering about -- since PNG is not the format of choice for "production quality" graphics -- but it does appear that there's a teensy bug somewhere in the implementations of pango and/or cairo for MS Windows, with respect to font-handling. Allin.