beryl manager crashes while booting

[MoX]

Binary package hint: beryl-core

after login if find a warning that beryl manager crashed. I can start it manually but it never comes up after a login

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Mon Apr 30 17:04:37 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/beryl
Package: beryl-core 0.2.1.dfsg+git20070318-0ubuntu2
PackageArchitecture: i386
ProcCmdline: beryl
ProcCwd: /home/stephan
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: beryl-core
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 XPending () from /usr/lib/libX11.so.6
Uname: Linux A-106 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