41 Bugs in 3 Minutes (Minecraft Snapshot 12w18a)

I didn't find all of these bugs myself. Thanks to the following people for bug reports: minecraftpg5, rossen2000, Geniebatch, LuigiHoax, elmo9626, Lucas Frizzo, ksalixegames, and the Minecraft Wiki. Donate via Paypal: https://www.paypal.com/cgi-bin/webscr?cmd=_donations&&business=LD78TK88KGJZN&&lc=US&&item_name=SethBling&&item_number=SethBling&&currency_code=USD&&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted