Minecraft wiki entry for Development_versions, associated text: MC-69876 – Pistons at Y=1 do not push downwards, and at Y=254 do not push upwards.
MC-124320 – Endermen can pick up and place snowless snowy grass blocks.
MC-130558 – Item frames cannot be emptied if gamerule doEntityDrops is set to false.
MC-134084 – If gamerule sendCommandFeedback is disabled, /msg or /tell do not display the message to the sender.
MC-136553 – Dyes in Creative inventory are in reverse order.
MC-152037 – Powered, activator, and detector rails are deleted when pushed or pulled onto a block they cannot be placed on.
MC-169203 – Sloped redstone type rail not dropping item when pushed by piston to a spot without adjacent block.
MC-177684 – Cocoa beans, bone meal, and lapis lazuli are placed among the dyes in the Creative inventory.
MC-177733 – Powered and activator rail duplication.
MC-196473 – Pufferfish gives Nausea II instead of the maximum of Nausea I.