texi2html doesn't come from texinfo-4.1. The version I have came with tetex:
# From @(#)texi2html 1.52 01/05/98 Written (mainly) by Lionel Cons, Lionel.Cons@cern.ch
# $Id: texi2html,v 1.5 1999/02/20 20:27:00 karl Exp $
# This version of texi2html is currently maintained at
# ftp://ftp.cs.umb.edu/pub/tex/texi2html by kb@cs.umb.edu.
Google suggests http://www.mathematik.uni-kl.de/~obachman/Texi2html/
-----Original Message-----
From: CRTS
Sent: Sunday, 31 March 2002 11:12
To: James Amundson
Cc: Maxima List
Subject: RE: [Maxima] 5.9.0 Todo
Using texi2html from texinfo-4.1
texi2html -number -split_chapter maxima.texi
generates reasonable html.