ntheorem cannot cope with tabular

[Jaakov]

Package: texlive-latex-extra
Version: 2013.20130722-1

Consider the following piece of code:
\documentclass{article}
\usepackage[thmmarks]{ntheorem}
\theoremstyle{break}
\theoremsymbol{QED}
\newtheorem{beispiel}{Beispiel}
\begin{document}
\begin{beispiel}
\begin{tabular}{lll}
bla & bla &bla\\
bla & bla &bla\\
bla & bla &bla\\
bla & bla &bla
\end{tabular}
\end{beispiel}
\end{document}

Run pdflatex on it. The output has two problems:
1) The table overlaps the header of the theorem. We expect that the table should start below the header.
2) The QED string is to the right of the table, vertically centered with respect to the table. We expect that QED is placed right-justified either on the line after the table or on the last line of the table.

We do not wish to change the contents of the environment to adapt to this bug (for which there are many ad-hoc ways). Rather, we wish to improve ntheorem such that it automatically places the table and the QED symbol on the right places. Any help is appreciated.