[quote name='laundrymatt']is the unrated edition even on blu-ray? I've never seen it anywhere, there are many people that say they prefer the PG13 because a lot of the swears seem out of place and very unnecessary (like they just threw them in to earn the rating((or lack thereof))...but like I said I have never seen it, I could go for more blood/gore, though!!![/QUOTE]Unrated version only came out on DVD. I've read that it supposedly "wasn't done in time" for the blu-ray.
Apparently they had different ratings in mind at different points in the shooting process. They assumed an R rating for the first few months of production. When they decided to go for a PG-13, they shot everything else with that rating in mind, then went back and edited the earlier footage.
The unrated version took the parts that were shot for PG-13, and actually added content to it (there's speculation that this added content was mastered for standard definition, presenting another hurdle for the conversion to blu-ray, but no one seems to have a straight answer on this). For the earlier parts that were meant to be an R to begin with, they just used the original uncensored footage. So the unrated cut contains a hodgepodge of both new "forced" material and legitimately uncut footage. It's all pretty confusing!