I am trying to typeset (with XeLaTeX) a simple Tufte-LaTeX example (http://tufte-latex.googlecode.com/files/Week5Lecture.tex) and getting an error message like the following:
/usr/local/texlive/2011/texmf-dist/tex/latex/amsmath/amsmath.sty:2496: LaTeX Er ror: Unable to properly define \@@eqno; primitive \eqno no longer primitive. See the LaTeX manual or LaTeX Companion for explanation. Type H <return> for immediate help. ... l.2496 \@saveprimitive\eqno\@@eqno
Is it obvious to an expert what the problem might be? Or should I supply more information?
Edit: The minimum nonworking example is:
The [bidi] is significant, I suspect this means bidirectional and provides support for right to left Hebrew.