teTeX 3.0: can't use amdmath w/ pdflatex?

It seems the documentation for tnt-mmtl (see http://mmtl.sourceforge.net/) 
cannot be built with teTeX 3.0, while it worked fine with version 2.0.
tnt-mmtl uses pdflatex on a .tex file that has \usepackage{amsmath}.

The error printed is:

 	! Illegal parameter number in definition of \math@cr@@@align@measure.
 	<to be read again>
 	                   1
 	l.1996 \edef\split@err#1
 	                        {%
 	? h
 	You meant to type ## instead of #, right?
 	Or maybe a } was forgotten somewhere earlier, and things
 	are all screwed up? I'm going to assume that you meant ##.

 	?

The input file only has ~600 lines, the problem seems to be somewhere in 
teTeX. A simple input file to reproduce the same error (also at line 1996) 
is:

 	\documentclass{article}
 	\usepackage{amsmath}
 	\begin{document}
 	\end{document}

The same error occurs for latex both pdflatex.

What is the recommended way to use amsmath with teTeX 3.0?


  - Hubert

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