Ubuntu 10.04 and the new button layout

I do not understand the reasons behind ubuntu people changing the location of the menu buttons from left to right.

I have been using ubuntu since the old days of Breezy and always have the minimize/maximize/close buttons on the right. Is there any reason to suddenly change such default?

In any case, you can change them back see here http://www.howtogeek.com/howto/13535/move-window-buttons-back-to-the-right-in-ubuntu-10.04/