Starting w3m: error

[Wolfgang Pfeiffer <pfeifferw tesionmail de>]

Hello,
when I do this
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$ cat /usr/doc/HTML/index.html | w3m -T text/html
-------------------------------------------------


.. then I get this answer from the shell
------------------------------------------------------------
/usr/bin/w3m: params[${#params[ ]}]="$1": bad substitution
/usr/bin/w3m: ${params[ ]}: bad substitution
Broken pipe
------------------------------------------------------------




this is my '/usr/bin/w3m' file:
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#!/bin/bash
# Copyright (c) 1999 Fumitoshi UKAI <ukai debian or jp>
# Copyright (c) 1999 Jacobo Tarrio Barreiro <jtarrio iname com>
# This program is covered by the GNU General Public License version 2
#
unset params

while [ $# -gt 0 ]
do
        case "$1" in
                -t | -l | -T | -bookmark | -cols | -ppc | -o | -config)
                        params[${#params[ ]}]="$1"
                        params[${#params[ ]}]="$2"
                        shift ;;
                -* | +* | *://*)
                        params[${#params[ ]}]="$1"
                        ;;
                *)
                        if [ -f "$1" -o -d "$1" ]
                        then
                                params[${#params[ ]}]="$1"
                        else
                                params[${#params[ ]}]="http://$1";
                        fi ;;
        esac
        shift
done

## for I18N variants, not yet: try w3mmee
#W3M=${W3M:-/usr/bin/w3m-ssl-i18n}
#test -x $W3M && exec $W3M "${params[ ]}"
#
#for W3M in /usr/bin/w3m-ssl-i18n /usr/bin/w3m-ssl
#do
# test -x $W3M && exec $W3M "${params[ ]}"
#done

W3M=/usr/bin/w3m-en
if [ -x /usr/bin/locale ]; then
  eval `locale`
fi
locale=${LC_ALL:-$LANG}
case X"$locale" in
 Xja|Xja_JP|Xja_JP.*)
    [ -x /usr/bin/w3m-ja ] && W3M=/usr/bin/w3m-ja
    ;;
 *)
    [ -x /usr/bin/w3m-en ] && W3M=/usr/bin/w3m-en
    ;;
esac
exec $W3M "${params[ ]}"
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Is there a mistake/bug in the file??

Or is it simply the wrong file I'm trying to execute, because doing this:
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cat /usr/doc/HTML/index.html | w3m-en -T text/html
---------------------------------------------------
starts w3m without complaints ....


Thanks in anticipation.
Regards
Wolfgang


-- 
http://www.geocities.com/wolfgangpfeiffer