funny scrollbar behavior under gtk

[emacs user]

I cannot reproduce this too easily, but occasionally I quit vm (the
mail reader) and find myself with the scrollbars as in the attached
image.

In GNU Emacs 21.3.50.41 (i686-pc-linux-gnu, GTK+ Version 2.2.1)
of 2005-01-03 on beach
Distributor `The XFree86 Project, Inc', version 11.0.40300000
configured using `configure '--with-gtk''

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: C
 value of $LC_CTYPE: nil
 value of $LC_MESSAGES: nil
 value of $LC_MONETARY: nil
 value of $LC_NUMERIC: nil
 value of $LC_TIME: nil
 value of $LANG: en_US.UTF-8
 locale-coding-system: utf-8
 default-enable-multibyte-characters: t

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scrollbar-bug.jpg
Description: JPEG image