mboman@mblxsrv01:~> compiz-manager 
Checking for Xgl: present. 
Checking for nVidia: not present. 
Checking for Xgl: present. 
Enabling Xgl with nVidia drivers...
Enabling Xgl with fglrx ATi drivers...
Starting emerald
 * Detected Session: gnome
 * Searching for installed applications...
/usr/bin/compiz: Trying '/usr/$LIB/libIndirectGL.so.1'
 * Non-mesa driver on Xgl detected
 ... no mesa libGL found for preloading, this may not work!