bug with run synaptic using deskbar-applet

[Maxim S.]

Binary package hint: gksu

Description: Ubuntu jaunty (development branch)
Release: 9.04

When I run using history entry "Synaptic Package Manager (gksu --de..." of deskbar-applet.
Display window with text:
"Could not grab your mouse.
A malicious client may be eavesdropping on your session or you may have just clicked a menu or some application just decided to get focus."
I has not had time to read the message, itself was closed in ~1 seconds (I have found it on heading on launchpad) and got an error report.
After reboot the error was displayed again.
Only after the second reboot, the manager was able to start using deskbar-applet.

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/gksu
NonfreeKernelModules: nvidia
Package: gksu 2.0.2-1ubuntu2
ProcCmdline: gksu --description /usr/share/applications/synaptic.desktop /usr/sbin/synaptic
ProcEnviron:
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: gksu
StacktraceTop:
 gdk_window_set_opacity ()
 ?? () from /usr/lib/libgksu2.so.0
 g_main_context_dispatch ()
 ?? () from /usr/lib/libglib-2.0.so.0
 g_main_loop_run () from /usr/lib/libglib-2.0.so.0
Title: gksu crashed with SIGSEGV in gdk_window_set_opacity()
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare