shutdown ubuntu. w/ beryl-manager started by console

[Juan]

Binary package hint: beryl-core

install ubuntu

in a terminal console:
sudo apt-get install beryl-manager emerald-themes
beryl-manager

after a while, restart ubuntu
on startup, error appears

ProblemType: Crash
Architecture: i386
Date: Mon May 7 07:27:15 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/beryl
Package: beryl-core 0.2.1.dfsg+git20070318-0ubuntu2
PackageArchitecture: i386
ProcCmdline: beryl
ProcCwd: /home/case
ProcEnviron:
 SHELL=/bin/bash
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=es_AR.UTF-8
Signal: 11
SourcePackage: beryl-core
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 XPending () from /usr/lib/libX11.so.6
Uname: Linux Maru173 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video