Actually, I just tried to transfer a crew from the xr2 to the arrow and instead of transferring, the crew became a group of nondistinct points floating in space. I could control them but they could not enter the ship, and were not even designated as the transferred crew members. They could not be seen from the outside, but if I went into cockpit mode I could seee from inside the suit (they SHOULD have gone in through the airlock.
I've had this issue with every vessel except the DVIV which has specific controlls to transfer the crew. The same goes with transferring crew FROM the arrow to anything but the dgiv.