False cursors appear when using GNU Emacs in xfce4-terminal

Binary package hint: xfce4-terminal

Version of Ubuntu: Xubuntu 8.04
Version of xfce4-terminal: 0.2.8-4ubuntu1
Version of emacs: 22.1-0ubuntu10.1

When I use emacs in xfce4-terminal by typing "emacs -nw",
sometimes cursors appear where they are not supposed to be.

You can reproduce this bug by following this procedure.

1) Run xfce4-terminal
2) $ emacs -nw -q
3) Type SPACE 7 times, and you can see another cursor appears next to the real cursor.

This behavior is not present when I use xterm, so I think xfce4-terminal is responsible for it.

The problem is more annoying when tab characters are involved.
(It may not be related to this bug, but I think it is)

1) Run xfce4-terminal
2) $ emacs -nw -q
3) Type C-q TAB
4) Type a (or any alphabet you like)
5) Type Backspace 2 times, and you can see an 8-character-wide cursor appears.
6) Type Backspace, and you can still see the wide cursor unchanged,
    so you can't know where the real cursor is from the appearance of the terminal.

I attach my ~/.config/Terminal/terminalrc, part of which is Japanese because I use Japanese language pack.

Does anyone have the same problem, or know a workaround?