Minecraft 1.4.5, Minecraft 1.4.6, Minecraft 1.4.7, Snapshot 13w07a, Minecraft 1.5, Snapshot 13w11a, Minecraft 1.5.1, Minecraft 1.5.2, Snapshot 13w18c, Snapshot 13w19a, Minecraft 1.6.1, Minecraft 1.6.2, Minecraft 14w21b, Minecraft 1.8.1
I was trying to test out the new beacon in my nether fortress and i encountered some issues.
1: the beacon does not seem to activate unless there is a shaft leading all the way to the bedrock ceiling on top of it
2: the beacon will never emit light beams in the nether.
due to the way the nether differed from the over world and sky lands the beacon needs a different rule set for this dimension