The new Ubuntu Light theme has the windows control buttons on the left rather than the right, where it traditionally is. This has resulted in many users voicing their opinions how they do not like the change. Mark Shuttleworth has meanwhile said that the buttons on left is here to stay. So, here are two workarounds to get it back to the right:

#1

Open the terminal.

Execute the command given below:

gconftool-2 --set /apps/metacity/general/button_layout --type string “menu:minimize,maximize,close”

#2

Open the terminal.

Add the PPA with the fixed buttons:

sudo add-apt-repository ppa:stownsend42/light-themes

Update the theme.