Where did the "hide the toolbar" thingy go on OS X Lion?
I don't think there's a way to make the toolbar capsule widget thingy show up again.
However, if you want to hide the toolbar, you can right-click on the empty toolbar area and choose the "Hide Toolbar" option:
You can also go to the View menu and choose "Hide Toolbar" from there. It may also have a keyboard shortcut of cmd-opt-t.
Right click and "Hide Toolbar" works for most apps. I couldn't get it to work with MacVim but this should:
Add the following to your .vimrc:
if has("gui_running")
set guioptions=egmrt
endif
test it out via:
:set guioptions=egmrt