Hidden Preferences in Acorn
Adding a "Save a Copy" menu item
The Apple HIG discourages a "Save a Copy" menu item, so it isn't included by default in Acorn. But it is really useful for some folks, so here's how to turn it on using the defaults command line tool. Quit Acorn, and paste this in the terminal:
defaults write com.flyingmeat.Acorn saveACopyMenuItem 1
Then launch Acorn, and it should be there in the File menu.
Hiding or showing the font face in the font popup
If opening up the font list is a little slow, you can disable the rendering of the font face preview in the list which will speed things up considerably. Quit Acorn, and then paste this in the terminal:
defaults write com.flyingmeat.Acorn displayFaceInFontPopup 0
If you would like to enable the font faces in the popup, use this:
defaults write com.flyingmeat.Acorn displayFaceInFontPopup 1