Romina - 2011-11-01

Hi guys,
I tried to use the \bibliographystyle{apalike} (\usepackage(apalike)) and use
\citet and \citep, but those only work for natbib. The newer version of natbib
is apparently not compatible with other styles anymore (see http://www.latex-
community.org/forum/viewtopic.php?f=50&t=4034)
and I get the error message
"!Package natbib Error: Bibliography not compatible with author-year
citations."
In my case I can just use \bibliographystyle{plainnat} in combination with
\usepackage{natbib} because the restrictions for citations from my supervisor
are not very exact. I would like to know, though, why natbib has been updated
2009 and made incompatible with other styles?
Thanks!