On OS X Snow Leopard, there was an option to hide the toolbar in many applications, such as 
![toolbar thingy](https://i.stack.imgur.com/jBGRq.png)

but I don't have that option on Lion anymore![lion macvim](https://i.stack.imgur.com/qNgkt.png)

This isn't MacVim specific issue, I don't see it in Adium and many other applications too. Did the button just disappear? Is there any way to show ita again?