When looking at a pdf file I noticed that a line was much thicker than it was supposed to be. Now it seems that Adobe Acrobat (both Pro and Reader) displays this line much thicker than SumatraPDF. I made sure the scaling of both programs was the same. Below are two crops at the same magnification that clearly show the problem. As I was under the impression that pdf should be platform independent, this seems like undesirable behaviour. Is this indeed the case, or am I misunderstanding something here?
For completeness, I'm using Acrobat Reader 11.0.18 and SumatraPDF 2.5.2 and the file was generated using pdflatex 2.9.5496 64-bit and pgf version 3.0.0. Acrobat and SumatraPDF images, respectively: