csquotes: wrong kerning?
It is not csquotes
fault, it is a problem in the OT1-fonts: The kerning is missing if the quote symbol is entered directly and not through a ligature:
\documentclass{article}
\begin{document}
of''
of\char"22
of\textquotedblright
\fontencoding{T1}\selectfont
of''
of\char"11
of\textquotedblright
\end{document}
So this is another reason not to use OT1-encoding -- at least if you want to use the computer modern fonts (the lmodern fonts e.g. don't have this problem).
You can fix what ot1enc.def
does (which is, in my opinion, wrong):
\documentclass{article}
\usepackage{csquotes}
% ot1enc.def has
%\DeclareTextSymbol{\textquotedblright}{OT1}{`\"}
% fix it
\DeclareTextCommand{\textquotedblright}{OT1}{''}
\begin{document}
\noindent
\enquote{nature of}\\
``nature of''
\end{document}