compiz.real crashed with SIGSEGV

[Maurizio]

Binary package hint: compiz

I'm using Ubuntu 8.04 Hardy Heron.
About Compiz:
compiz:
  Installed: 1:0.7.2-0ubuntu2
  Candidate: 1:0.7.2-0ubuntu2
  Table version:
 *** 1:0.7.2-0ubuntu2 0
        500 http://archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status
When I've boot the pc, before I use it, the Ubuntu Bug Tracker was generated this error.

ProblemType: Crash
Architecture: i386
Date: Wed Mar 26 01:04:04 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/compiz.real
NonfreeKernelModules: nvidia
Package: compiz-core 1:0.7.2-0ubuntu2
PackageArchitecture: i386
ProcCmdline: /usr/bin/compiz.real --ignore-desktop-hints --replace --loose-binding --sm-client-id default0 ccp
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: compiz
Stacktrace:
 #0 0x08055a4d in ?? ()
 #1 0x0807d910 in ?? ()
 #2 0x00000003 in ?? ()
 #3 0x000000a9 in ?? ()
 #4 0x00000000 in ?? ()
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: compiz.real crashed with SIGSEGV
Uname: Linux 2.6.24-12-386 i686
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video