unity_support_test crashed with SIGSEGV in nux::IOpenGLAsmVertexShader::IOpenGLAsmVertexShader() Under VirtualBox 4.0.4

[s sander]

Ubuntu 11.04 alpha3 running as guest under VirtualBox 4.0.4 with Windows 7 SP1 host
Unity interface fails - crashes if "3D acceleration" enabled, silently fails to start if "3D acceleration" disabled

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: nux-tools 0.9.30-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
Architecture: i386
Date: Thu Mar 10 19:58:12 2011
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/lib/nux/unity_support_test
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
LocalLibraries: /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGLerrorspu.so /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGLcrutil.so /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGLfeedbackspu.so /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGLpackspu.so /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGLpassthroughspu.so /opt/VBoxGuestAdditions-4.0.4/lib/VBoxOGL.so
ProcCmdline: /usr/lib/nux/unity_support_test
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 ?? ()
 nux::IOpenGLAsmVertexShader::IOpenGLAsmVertexShader(nux::NString) () from /usr/lib/libnux-graphics-0.9.so.0
 nux::GpuDevice::CreateAsmVertexShader(nux::IOpenGLAsmVertexShader**) () from /usr/lib/libnux-graphics-0.9.so.0
 nux::GpuDevice::CreateAsmVertexShader() () from /usr/lib/libnux-graphics-0.9.so.0
 nux::IOpenGLAsmShaderProgram::IOpenGLAsmShaderProgram(nux::NString) () from /usr/lib/libnux-graphics-0.9.so.0
Title: unity_support_test crashed with SIGSEGV in nux::IOpenGLAsmVertexShader::IOpenGLAsmVertexShader()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors: (nautilus:1376): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed