TeXLive-2015 中 Babel italian 的问题

Question

在 iMac 27（OS X Yosemite 10.10.5）上升级到 TeXLive-2015 后，我遇到了 Babel italian 问题。如果使用 TeXLive-2014，同样的文件可以顺利运行。有什么建议吗？

我的序言：

\documentclass [a4paper,twoside,11pt]{article}

\usepackage{appendix} % more flexible treatment of the appendices
\usepackage[english,italian]{babel} % Il testo è in italiano
.........

我的控制台输出：

This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(./Storia_Famiglia_Budinich.tex
LaTeX2e <2015/01/01> patch level 2
Babel <3.9m> and hyphenation patterns for 79 languages loaded.
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/size11.clo))
(/Users/mbh/Library/texmf/tex/latex/misc/appendix/appendix.sty)
(/Users/mbh/Library/texmf/tex/latex/misc/babel/babel.sty
(/Users/mbh/Library/texmf/tex/latex/misc/babel/english.ldf
(/Users/mbh/Library/texmf/tex/latex/misc/babel/babel.def))
(/Users/mbh/Library/texmf/tex/latex/misc/babel/italian.ldf
/Users/mbh/Library/texmf/tex/latex/misc/babel/italian.ldf:91: Undefined control
 sequence.
\@initiate@active@char ...e }}{}\else \@activated 
                                                  {#1}\@namedef {normal@char...
l.91 \initiate@active@char{"}
                             %
? 
........