I also saw that the maximize, minimize, and close buttons have been shifted over to the left side in the latest release from some screenshots online. This is not a big deal for me. Some Ubuntu users, especially those who are Microsoft converts are complaining loudly about it. Mark Shuttleworth put his foot down and said that this is how it is going to be.
By the way, if you want to move your buttons back the other way, then type this command:
gconftool-2 --set /apps/metacity/general/button_layout --type string "menu:minimize,maximize,close"
Mac converts, what little of them there are to the Ubuntu ranks are probably quite happy. In KDE is it is not a big deal to switch buttons around, it is as easy as opening the preferences window and sliding them where you want them. You can also place them in different order.
For the next Ubuntu release, maybe they should just put the buttons smack dab in the middle. It will appease the Mac users, and the Windows users. Or maybe it will just piss everyone off?