Code:
\documentclass[a4paper,12pt,BCOR1cm]
{scrreprt}
\usepackage[ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[ansinew]{inputenc}
\usepackage{lmodern}
\usepackage{amsmath}
\usepackage{graphicx} %%Zum Laden von Grafiken
\usepackage[headsepline,plainheadsepline]{scrpage2}
\pagestyle{scrheadings}
\ihead[\rightmark]{\rightmark} \chead[]{}
\ohead[\pagemark]{\pagemark} \cfoot[]{}
\automark{chapter}
\usepackage[style=authoryear-icomp, backend=bibtex]{biblatex}
%\usepackage[style=authoryear-icomp]{biblatex}
\usepackage[babel,german=quotes]{csquotes}
\usepackage[printonlyused]{acronym}
\bibliography{refs}
\usepackage{rotating}
\usepackage{amssymb}
\usepackage{footnote}
\usepackage{float}
\usepackage{floatflt}
\usepackage{tabularx}
\makesavenoteenv{sidewaystable}
\makesavenoteenv{tabular}
\makesavenoteenv{table}
\usepackage{subfigure}
\begin{document}
\begin{figure}[htb]
\centering
\includegraphics[width=.9\textwidth]{diagramme/xyz}
\caption{xyz}
\label{img:xyz}
\end{figure}
\end{document}
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