compiz crashed with SIGSEGV in TfpTexture::bindTexImage()

Hallo
testing installations of Ubuntu amd64 Desktop in Vbox with 128 MB video, 2300 MBram.
The crash happens usually during the installation, but not all the times that I-ve tried.
Two times happens just at the second window of the installer, now on another step.
Thanks
Fabio.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: unity 6.4.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.5.0-14.15-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
CasperVersion: 1.322
CrashCounter: 1
Date: Sun Sep 9 16:23:06 2012
ExecutablePath: /usr/bin/compiz
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120909)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f5f7f0ec696: movdqu -0x10(%rsi),%xmm0
 PC (0x7f5f7f0ec696) ok
 source "-0x10(%rsi)" (0x2a98d6d0) not located in a known VMA region (needed readable region)!
 destination "%xmm0" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
 ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
 TfpTexture::bindTexImage(unsigned long const&) () from /usr/lib/compiz/libopengl.so
 TfpTexture::enable(GLTexture::Filter) () from /usr/lib/compiz/libopengl.so
Title: compiz crashed with SIGSEGV in TfpTexture::bindTexImage()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo