Problem with @periodical

Hi all!
Sorry for bothering you with the following problem which seems at first
glance pretty easy.
I recently switched from jurabib 0.52 to jurabib 0.6 and discovered a
unexpected change within the periodical-entry:
With the old Jurabib there was NO Komma between Journaltitle and Volume
(example: Historische Zeitschrift 29 [1989]) while with 0.6 there suddenly
is one (Historische Zeitschrift, 29 [1989])
This behaviour occurs independently if I use Jurabib with my options or
plain, without any options. Although I read several times through the
manual, I couldn't find a way to remove this unwanted comma. Even in the
manual (P. 23) the periodical-example is shown without a comma between
Journaltitle and Volume.

How can I remove this comma?

Thanks in advance
Markus

example files:
\documentclass[12pt,a4paper]{scrartcl}
\usepackage{jurabib}

\begin{document}
Example\footcite[S.~561]{Fried}.
\bibliography{test}
\bibliographystyle{jurabib}
\end{document}

@PERIODICAL{Fried,
  AUTHOR =       {Johannes Fried},
  TITLE =        {Erinnern und Vergessen. Die Gegenwart stiftet die Einheit
der Vergangenheit},
  SHORTTITLE =   {Erinnern und Vergessen},
  JOURNAL =      {Historische Zeitschrift},
  YEAR =         {2001},
  volume =       273,
  pages =        {S.~561--593},
}





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