I Built a barebones system [case (no PSU), mobo, CPU, heatsink, & 2 case fans] for a friend, & posted it to her by Special Delivery. For those not in the UK, Special Delivery is supposed to be a sort of premium service offered by the Royal Mail, our national mail service. I paid £18.30, which includes insurance to cover upto a value of £250, & guaranteed next [working] day delivery by 12pm. They are also supposed to take better care of stuff sent by Special Delivery than by normal mail.
It arrived with her this morning. She emailed me [from her old PC] to tell me that it had, but that the HS had come off. My 1st thought was that the middle lugs had broken off of the socket, & that the HS being able to move freely around the interior of the case may have caused further damage. After sending pics that I had taken of the way it was supposed to look & asking her to describe what she could see [she doesn't have a digital camera or webcam] it seemed apparent that the socket had literally come off the mobo, still attached to the heatsink!!! I got her to sit it on her scanner, so I could see it for myself, & that pic is what she sent. Apparently all the little metal pins/contacts/whatever of the socket are still sticking out of the mobo.
I've seen this happen to other connectors if they were pulled much too hard, but never heard of it happening to a CPU socket. I had even taken the fan off of the heatsink to reduce weight attached to the socket, & secured it elsewhere inside the case. I got her to weigh the heatsink, fan adapter, CPU & heatsink, which were all still joined together, & they only came to 330g, which is only 30g over AMD's max reccomended limit, & then there's the chip & socket as part of that weight too, so the difference is even less.