Patch 2.0.1 introduced a lot of significant changes to the loot system in the game. One of the significant ones was the revamp to the Puzzle Ring, which now has a new effect:
Summon a treasure goblin who picks up normal-quality items for you. After picking up 12–16 items, he drops a rare item with a chance for a legendary.
What is the cooldown on the goblin item drop?
Does the effect stack if you have one on your character and another on your follower (i.e. two goblins)?
Is the drop chance for the rare/legendary affected by increased Magic Find? If so, approximately how much?
Is there a cap on them max item level of the dropped item? (While < lvl 60, at lvl 60, and when the level cap is raised in the expansion.)
Does the item counter reset when you leave the game, change acts, or die?