xnest 2:1.3.0.0.dfsg-12ubuntu3 (amd64 binary) in ubuntu gutsy

 Xnest is a nested X server that simply relays all its requests to another
 X server, where it runs as a client. This means that it appears as another
 window in your current X session. Xnest relies upon its parent X server
 for font services.
 .
 Use of the Xephyr X server instead of Xnest is recommended.
 .
 More information about X.Org can be found at:
 <URL:http://xorg.freedesktop.org>
 <URL:http://lists.freedesktop.org/mailman/listinfo/xorg>
 .
 This module can be found as the module 'xserver/xorg' at
 :pserver:anoncvs@cvs.freedesktop.org:/cvs/xorg