I've also noticed some differences on two of my blogs. Both are running the latest 3.2.1, but one has been going for a while and has constantly been upgraded, whilst one is a brand new install of 3.2.1.
If you look at these screens, they have different features:
Writing settings on new install: http://bit.ly/w1csih
Writing Settings on older install: http://bit.ly/uuk7sX
Media Settings on new install: http://bit.ly/u7HTtm
Media settings on older install: http://bit.ly/rumU7w
You can see the difference in the yellow square.
Given it's the same version of WordPress, why would these differences exist?