I'm pretty sure that means the actually barrier block not a barrier surrounding it i think you should be fine but i would make the generator in a creative world in 1.8.1 and see if it works
What he means By "when its done." is that's when 1.9 will come out when it's ready to be released but dude 1.8 came out 9 days ago 1.9 wont be here for a bit
a snapshot is a experimental version for the pc version of minecraft and in one of the recent one's they added mutton but sense you play on the ps3 idk if it will be added soon if ever
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you can tame them but there really annyoing
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the skin's of the new rabbit's