[OS X TeX] natbib: round parentheses vs. square brackets

[Joshua Smith]

Hello all,

With this new version of natbib that has been released, I have been  
reminded to ask the following question.  When I run the following  
driver file with the accompanying BibTeX file, the year gets typeset  
in square brackets instead of in round parentheses, which is supposed  
to be the default (p. 19 of the v8.0 documentation).  However, if I  
take the contents of the .bbl file and put it directly into the tex  
file, the year is typeset in round parentheses.  Do others experience  
this?  I realize that I can force round parentheses with the round  
option, but is this a bug?

Thanks,
Josh


Driver file:

\documentclass{article}
\usepackage{natbib}
\begin{document}
\citet{AimedieuGrebe:2004}
\bibliographystyle{abbrvnat}
\bibliography{bibfile}
\end{document}


Bib file:

@ARTICLE{AimedieuGrebe:2004,
author  = "Patrick Aimedieu and Reinhard Grebe",
title   = "Tensile Strength of Cranial Pia Mater: Preliminary Results",
journal = "Journal of Neurosurgery",
volume  = "100",
pages   = "111--114",
year    = "2004",
}


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