I set some all-caps words in my document as typewriter. Using scrartcl as documentclass, with a default fontsize of 11pt, yields a PDF that looks rather bad in Acrobat Reader. Here is an example:
\documentclass{scrartcl}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\begin{document}
\texttt{FOO\_BAR}
\end{document}
When using another documentclass like article or with documentclass scrartcl and the option [fontsize=10pt] everything renders fine. I tested Acrobat Reader 11 on MacOS Lion and Version 9 on Windows XP. On the other hand, using e.g. MacOS Preview or Skim as PDF viewers, even the original version with fontsize 11pt renders fine.
[Update] Here is a screenshot of the rendering in Acrobat Reader 11 on MacOS Lion:
and a screenshot from the rendering in MacOS Preview:
Here you can see that e.g. the letters F and R in Acrobat are not as high as the other letters, in contrast to the rendering of Preview (or when using a fontsize of 10pt or 12pt).
[Update] This is not a duplicate of Why are Bitmap-Fonts used automatically?. In my example you can see, that I already use modern and I just checked, that Acrobat really says that Type 1 fonts are used. So I have no problems with bitmap/Type3 fonts.
Is there any way to make those typewriter texts look good in Acrobat Reader with size 11pt?
lmodernfont.