Menu is displayed in incorrect way when using multiple displays

[ENargit]

I use two displays (laptop and an extra display). When I open Goldendict on second display and click at main menu, popup is displayed in wrong place.

Also, in any case(any display) using of main menu causes repainting of another display and corresponded area(similar coordinates but on other display) is painted with background color(or background image).

I've attached only photo of this effect because it is not possible to take a screenshot when menu is opened. As you can see, on right display menu popup is detached from it's header. Also, on left display there is a hole in Chromium window(exact window doesn't matter) and we see the background image.

Expected behavior: menu always attached to it's header, only correct display area is repainted.

$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

$ LC_ALL=en_US apt-cache policy goldendict
goldendict:
  Installed: 1.0.1-1ubuntu1
  Candidate: 1.0.1-1ubuntu1
  Version table:
 *** 1.0.1-1ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ natty/universe i386 Packages
        100 /var/lib/dpkg/status