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Hello,

I have a layout problem, which consumes a lot of time without any results.

I use the fancyhdr pkg and add a header rule:

\documentclass[twoside,openright,a4paper,11pt]{book}

\usepackage{fancyhdr}
% pagestyle
\pagestyle{fancy}
\fancyhf{}
\fancyhead[RO]{\slshape \rightmark}
\fancyhead[LE ...