When I installed Ubuntu 12.04 last time I noticed that shortcut OPEN IN TERMINAL in context menu suddenly disappeared. It is very useful shortcut especially when you want to open terminal in folder which is located very deep in directory tree. So if you want to enable shortcut OPEN IN TERMINAL in nautilus after right clicking, run these commands in terminal:
sudo apt-get install nautilus-open-terminal
The first command will install application and the second will restart nautilus file browser.