For some unknown reason the following produces an error in classicthesis:
% at the beginning of classicthesis-config.tex
\renewcommand{\d}{\mathbf{d}}
\begin{document}
$\d$
\end{document}
The error says \d is invalid in math mode and $ is missing. It doesn't occur with a simple test case, for sure it's related to the template settings.
hyperref? i thinkhyperrefredefines\d, so all bets would be off. – barbara beeton May 07 '13 at 22:30\dis already defined in the latex kernel. And, in this case, to make things complicated, as @barbara points out, hyperref redefines\dto be\PD1-cmd \d \PD1\dfrom\OT1-cmd \d \OT1\d. In particular, however, note that, just this example (together with\documentclass{...}) will compile. :-) – kan May 07 '13 at 22:33\newcommand{\bd}{\mathbf{d}}– egreg May 08 '13 at 08:28