Die Hard PG-13 vs UNCUT - Differences here

[Nicadian]

according to ign. com dvd editor said this :

as an "unrated" edition, this disc is shamefully similar to the theatrical release. With a few extras curses and a dollop of additional blood, there's little in the way of new material, which quite surprisingly isn't the worst sin of omission committed here. Fans of the series who may have been disappointed with the PG-13 release of the fourth film - most notably its painfully obvious muddling of the Yippie Ki Yay, Motherf*@ker catchphrase - will be stunned to learn that the line has been neither restored nor clarified on this unrated DVD. It's small element, to be sure, but it's a line of dialogue so integral to the previously R-rated series that it felt awkwardly-delivered in the tamer theatrical version. To not, in some way, provide fans with that small bit of satisfaction on an otherwise unrated DVD is a fairly significant issue.]

http://dvd.ign.com/articles/834/834508p1.html