I recently installed the Ubuntu Remix on my netbook. The most annoying feature i found was the ‘Maximus’. It maximizes every window you open, even small windows which should not be maximized.
This is how you can disable this feature.
Press Alt + F2, enter gconf-editor,Go to -> /apps/maximus/no_maximize and set it to "true" (i.e check the check-box).
So, if you want the restore, close buttons on the maximized windows then uncheck