Ever since this update, on Mac 10.8.4, exiting out of full screen caused an error, I'd assume it's a problem with the downgraded LWJGL. http://pastebin.com/ce2nDKQu
I've updated the LWJGL to the newest version for mac, haven't had any problems since. I'd suggest an update to allow an option for mac users to choose the LWJGL version, as many versions as necessary (which ATM is 2). Which would allow the users who experience issues like this to select the newest version, while other older users can use the previously working release.