Degree (°) signs disappear with package xfrac

Question

When I use the package xfrac all of my °-signs are gone.

\documentclass[12pt,a4paper,headinclude,headsepline,twoside,parskip=half,DIV12,BCOR12mm,numbers=noenddot]{scrreprt}
\usepackage{rotating} 
\usepackage{ngerman}
\usepackage[latin1]{inputenc}
\pagestyle{headings}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{siunitx} 
%\sisetup{per-mode=fraction, fraction-function=\sfrac}
\usepackage{xfrac} 

\begin{document}

\ang{10}

10°

\si{\degree}

\end {document}

Without xfrac everything is working fine. It doesn't occur if I use pdflatex.

I'm using Windows 7-64bit with TexnicCenter and Miktex 2.9.

Thanks in advance for helping me!

Bye, Michael

Answer 1

Just to end this: I'm using a current MiKTeX 2.9 system on Windows 7 and have no problems with your given MWE (same as @egreg said in his comment).

So I guess you are using an outdated TeXLive version? If so please update first!

As @Ulrike remarks in her comment you used an outdated package ngerman. Better use package babel instead.

Document class scrreprt from KOMA-Script handels some options now as key=value.

I have changed your MWE, pretty printed it and used the KOMA-Script syntax:

\documentclass[%
  ngerman          % given to all packages using languages
 ,fontsize=12pt    % default is 11pt
 ,paper=a4         % default
 ,headinclude      %
 ,headsepline      %
 ,twoside          % default is oneside
 ,parskip=half     % 
 ,DIV=12           % calculates typing area
 ,BCOR=12mm        % 12mm für die Bindung!
 ,numbers=noenddot %
]{scrreprt}

\usepackage[latin1]{inputenc}
\usepackage{babel}            % gets ngerman from class option

%\usepackage{amsmath}
%\usepackage{amssymb}
\usepackage{siunitx}

%\sisetup{per-mode=fraction, fraction-function=\sfrac}
\usepackage{xfrac} 

\begin{document}

\ang{10}

10°

\si{\degree}

\end {document}

Answer 2

I also can't reproduce the error. As a work-around, perhaps you could try $^\circ$ as a degree sign?