Beryl crashes when Amarok, skype and Firefox open

Binary package hint: beryl-core

I just start the computer, launch Firefox,Amarok and Skype and Beryl suddenly crash.

ProblemType: Crash
Architecture: i386
Date: Wed Mar 28 19:30:18 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/beryl
Package: beryl-core 0.2.1.dfsg+git20070318-0ubuntu2
PackageArchitecture: i386
ProcCmdline: beryl --use-copy
ProcCwd: /home/Joh
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=fr_BE.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: beryl-core
Stacktrace:
 #0 0xb6f03187 in ?? () from /usr/lib/beryl/libdecoration.so
 #1 0x00000001 in ?? ()
 #2 0x00000006 in ?? ()
 #3 0x00000000 in ?? ()
StacktraceTop:
 ?? () from /usr/lib/beryl/libdecoration.so
 ?? ()
 ?? ()
 ?? ()
Uname: Linux 13workstation 2.6.20-13-386 #2 Sun Mar 25 00:18:53 UTC 2007 i686 GNU/Linux
UserGroups: audio cdrom dialout floppy lpadmin plugdev scanner video