Output below gerryalpha@gerryalpha-desktop:~$ compiz --replace Checking for Xgl: not present. Detected PCI ID for VGA: Checking for texture_from_pixmap: present. Checking for non power of two support: present. Checking for Composite extension: present. Comparing resolution (1280x1024) to maximum 3D texture size (8192): Passed. Checking for nVidia: present. Checking for FBConfig: present. Checking for Xgl: not present. ^CSegmentation fault (core dumped)  the desktops dropped to 2 and a crash report was generated I will try and retrieve it but last time the machine froze. > ----- Original Message ----- > From: Colin Watson > Sent: 09/09/08 06:30 pm > To: