Not sure if this is a bug, but it doesn't make much sense to me so I recorded it as such. Could be a feature-request as well.
Observed: A summoned Familiar will only speak to the mage who summoned him, however when that mage asks a Familiar for pick-pocketed items, he gives them to the party leader -- Even if the leader is not the mage he is speaking to.
Expected: A Familiar, being bound to the mage who summoned him and trusting none other, should only give the items to the mage who summoned him. If their inventory is full, he should drop them on the ground.
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1
Processor: Intel(R) Core(TM) i7 CPU X 990 @ 3.47GHz (12 CPUs), ~3.5GHz
Memory: 12278MB RAM
DirectX Version: DirectX 11
Dual AMD Radeon HD 6900 Series Graphics Card