Compiling the code below yields a misalignment of the text when the box is drawn.
\documentclass[fleqn,11pt]{book}
\usepackage{cutwin}
\begin{document}
\renewcommand\windowpagestuff{\flushright\rule{2cm}{2cm}}%
\opencutright%
text text text text text text text text text text text text text text text text text text text text text text text text text text text text text
\begin{cutout}{1}{0.79\linewidth}{0pt}{5}%
text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text
\end{cutout}
\end{document}

Would you know nice tricks to avoid this behavior?

wrapfigure. – Feb 17 '13 at 12:22