I just loaded 6.7.27, then 6.7.28, and the problem still exists. I set it to a thickness of 4 pt. and it only thickens in the time axis. Makes for some rather odd effects, as the more vertical traces are thick, but the horizontal parts are very thin, quite obviously 1 pt.
I attached a .psdata file showing that issue, as well as another display issue. Channel C has a 1 kHz sine wave, with a 10 kHz filter applied to make it quiet. The line thickness is set to 4 pt. Notice how it is thin at the top. If you expand it shows easily. Also, the discontinuity just off the top and bottom of the sine wave is a strange effect of the display. If you go into the Tools-->Preferences-->Colors and swap between 4 pt and 1 pt, you can see the weird effects.
- 1 kHz sin wave, V6.7.28 (RC), showing line thickness in time axis only, and discontinuity in waveform.
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