OSX 10.9, general feeling is that the app is not ready for prime-time. There's a number of crashes that I've encountered, this is the only one I can reliably trigger though.
Print wallet: Opening "wallet properties" > "backup this wallet" > "create paper backup" will open a standard OSX print window, after about two seconds the window loses focus and will ignore all clicks. Clicking a button before the window loses focus will sometimes cause Armory to crash.
http://i.imgur.com/sVgSxwu.gif