ubuntu title bar missing

http://www.pendrivelinux.com/ubuntu-desktop-effects-fixing-the-missing-titlebar/

Ubuntu Desktop effects - How to fix the missing titlebar:

1. Open up a terminal and type sudo su (enter your password)
2. Type gedit /etc/X11/xorg.conf
3. From the xorg.conf file, find the section called Section "Device" and just before EndSection, add the following and save the file:

Option "AddARGBVisuals" "True"
Option "AddARGBGLXVisuals" "True"

4. Here is an example of an edited Section (your Section may vary):

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 6150"
Option "AddARGBVisuals" "True"
Option "AddARGBGLXVisuals" "True"
EndSection

5. Restart Ubuntu and the titlebar with related window decorations should reappear