Building the matplotlib docs using Sphinx svn 66969 results in a Latex
error ending in:

) (/usr/share/texmf-texlive/tex/latex/graphics/graphicx.sty
(/usr/share/texmf-texlive/tex/latex/graphics/graphics.sty
(/usr/share/texmf-texlive/tex/latex/graphics/trig.sty)
(/etc/texmf/tex/latex/config/graphics.cfg)))
(/usr/share/texmf-texlive/tex/plain/misc/pdfcolor.tex)
! Extra \fi.
l.62 \fi\fi

The line 62 turns out to be in sphinx.sty; removing one "\fi" allows the
build to proceed.  The svn diff is:

efiring@manini:~/programs/py/sphinx_svn$ svn -x '-w' diff
Index: sphinx/texinputs/sphinx.sty
===================================================================
--- sphinx/texinputs/sphinx.sty	(revision 66993)
+++ sphinx/texinputs/sphinx.sty	(working copy)
@@ -59,7 +59,7 @@
 \ifx\ifxetex\undefined\else\ifxetex
   \def\py@NormalColor{\color[rgb]{0.0,0.0,0.0}}
   \def\py@TitleColor{\color{TitleColor}}
-\fi\fi
+\fi
 
 % Increase printable page size (copied from fullpage.sty)
 \topmargin 0pt