Comment 5 for bug 713504

Have installed Natty on a hard drive on this machine - get the SAME error when running. Run defaults to gnome desktop. Trying to re-start Unity says that compiz fails with the above. Alpha 3 release version even after installing updates as at today. Got the following when trying:
barry@barry-desktop:~$ unity
unity-panel-service: no process found
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Initializing core options...done
Initializing bailer options...done
Initializing detection options...done

(firefox-bin:1687): LIBDBUSMENU-GTK-CRITICAL **: dbusmenu_menuitem_property_set_shortcut: assertion `gtk_accelerator_valid(key, modifier)' failed
Initializing composite options...done
compiz (opengl) - Fatal: GLX_EXT_texture_from_pixmap is missing
compiz (opengl) - Fatal: Software rendering detected
compiz (bailer) - Info: Ensuring a shell for your session
barry@barry-desktop:~$ Cannot register the panel shell: there is already one running.
barry@barry-desktop:~$ Window manager warning: Invalid WM_TRANSIENT_FOR window 0x3a000eb specified for 0x3a0019b (Default Br).

(firefox-bin:1687): LIBDBUSMENU-GTK-CRITICAL **: dbusmenu_menuitem_property_set_shortcut: assertion `gtk_accelerator_valid(key, modifier)' failed

Tried to use 'ubuntu-bug compiz' which sent information but then Firefox failed with the above related error. Same ISO installs and runs on a different PC.