Mouse clicks on menus do not function or are displaced

[Kiri]

I am unsure whether this is the proper package. I have tested 2 dependent packages.

In Poe (package poe.app), i am unable to clicking on menu entries has no effect.

In addressmanager.app , when i first ran it, a click on the menu activated the entry about 4 entries below where i clicked instead of the entry i clicked. This was also true for clicking on the title bar. After much clicking, the clicks became correctly located on the menu, even after closing and restarting the app.

I speculate that these bugs have a common cause, although i am especially uncertain now that AddressManager is correctly handling the clicks on the menu and Poe still does not.

For both apps, I can summon the menu by double clicking on the icon.
The keyboard functions for entries Hide & Quit.

ProblemType: Bug
Architecture: i386
Date: Tue Oct 27 08:10:50 2009
DistroRelease: Ubuntu 9.10
Package: gnustep-back0.16 0.16.0-3
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de_DE.UTF-8
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: gnustep-back
Uname: Linux 2.6.31-14-generic i686

[Kiri (kiri)]

My desktop environment is Gnome.
Poe output these warning messages at start up.
2009-10-27 08:00:01.548 Poe[4184] XShm pixmaps not supported by X server.
2009-10-27 08:00:01.619 Poe[4184] Falling back to normal XImage: s (will be slower).

I did not find this bug in the upstream bug tracker.
https://savannah.gnu.org/bugs/?group=gnustep