After the update launched (Minecraft Caves & Cliffs Part II), I noticed something right off the bat. I wanted to make a randomizer using droppers, so I used the command /clone and set the command block to Repeat to clone a Dropper and all of the items inside the Dropper. Powering the block that was cloned (The 2nd Dropper) using any redstone signal of some sort creates the dropper to drop more items at once than it should drop. I have done the same setup in the past, and have done it in other worlds as well, and it worked perfectly. I refuse to open those worlds now because of such an odd glitch with the /clone command.