You can move them to the right without changing the theme. Open a terminal
Ctrl+Alt+T and paste (Shift+Ctrl+V) this command in: gconftool-2 --set
"/apps/metacity/general/button_layout" --type string
":minimize,maximize,close"

Or you can do it from the GUI with this tutorial:
www.matbra.com/.../mudando-a-posicao-dos-botoes-do-menu-no-ubun\
tu-11-10/
Note that you will have to install gconf-editor as the first step and you
can do that using the commandline as in the tutorial or from Software
centre, as you prefer.

You will have to logout and back in to see the change take effect.