page1.htm :
========================
<form method="POST" action="page2.php">
<input type="text" name="title">
<input typt="submit">
</form>
========================

When the inputbox content is BIG5 encoding words, after submiting, the $_POST['title'] variable will lose pre-words.
example:
input = ???դ@?U
$_POST['title'] = "?@?U"

###########################################################
configure line: 
CC=gcc \
CFLAGS="-O6 -mcpu=pentiumpro" \
./configure \
--enable-track-vars \
--enable-inline-optimization \
--enable-mbstring \
--enable-mbstr-enc-trans \
--enable-ctype \
--disable-wddx \
--disable-debug \
--disable-experimental-zts \
--with-xml \
--with-mcrypt=/usr/local \
--with-dom=/usr/local \
--with-zlib-dir=/usr/local \
--with-mysql=/usr/local/mysql \
--with-iconv=/usr/local \
--with-apxs=/usr/local/apache/bin/apxs \
--prefix=/usr/local