Dispenser/Dropper Bug When Item Slots Full

In the 1.1 changelog they fixed hoppers not pulling items from above if all of its slots were occupied. This seems to have broken something with dispensers. Now, a dispenser will not dispense into another one if the receiving dispenser has all of its slots occupied. To test, place two dispensers/droppers facing each other. Fill every slot of one with a single stackable item. Then place one of that same stackable item into the other dispenser/dropper. When you try to dispense an item into the slot-full one, nothing happens.