Consider the following .tex document
\documentclass[12pt]{article}
\begin{document}
F.~Bar
\end{document}
Somehow the document gets rendered as this (using texi2pdf)

The problem does not appear to be in the typesetting since the same thing happens to files that are sent to me by Windows users and that compile fine for them.
Does anyone happen to see what is the problem?
texi2pdf). – egreg Oct 4 '12 at 14:15~in your editor with a special input encription or did your editor use a special code setting? – Kurt Oct 4 '12 at 14:16