Incorrect font size for the powers of units using siunitx package

[josephwright]

[Anonymous report]

I am using KOMA script style for my thesis. To use SI units, I have included the package siunitx. It is pretty appealing to use this, owing to its ease. However, I find one issue in doing so.

In the per-mode = reciprocal, the font size of the power appears as the same size as the normal number size. (e.g. 10\si{\radian\per\second} yields a rad s^-1, but the size of the power "-1" is same as the size of the "10" following it.

I hence switched to the per-mode = symbol. However, even in this case, 10\si{\radian\per\second\squared} gives a power of "-2" with the font size of normal numbers. I need the font size of the powers to be smaller, as the rest of the powers in my document.

[josephwright]

Please can you post an example of your input. There is no issue with

\documentclass{scrartcl}
\usepackage{siunitx}
\begin{document}
\si{\radian\per\second} $\textrm{rad}\,\textrm{s}^{-1}$
\end{document}

[josephwright]

[Anonymous comment]

I found exactly which package was not compatible and causing the incorrect font size of powers. Its the breqn package, used for breaking long equations. I tried the code below.

\documentclass{scrreprt}
\usepackage{breqn}
\usepackage{siunitx}

\begin{document}
10 \si{\radian\per\second} $\textrm{rad}\,\textrm{s}^{-1}$
\end{document}

On compiling, the 1st rad/s is improper, while the 2nd is correct. Please help me find a fix for this issue, as the use of breqn package is inevitable in my thesis. Thank you very much.

[josephwright]

Fixed by ba52916.