I've just sold my K5 to a gent in Victoria and sent it to his suburban PO box.
It was posted 23/10/2012 and hadn't arrived as of yesterday.
I did a 'track' on the Registered Post No. and was somewhat surprised to see that it had been delivered on 25/10/2012.
Yes, it was delivered, from the wrong Post Office, to the wrong person.
The parcel was dropped at the wrong Post Office, and when the box holder at the wrong PO got a card saying they had a parcel to collect, it was given to them and they signed for it in a different name to the addressee.
I don't think it is on the level rocket science technology to look at a clearly marked address label and see that the item is at the wrong Post Office.
Anyway I've started an investigation so I hope it gets sorted quickly and the guy gets his camera in the same pristine condition I sent it to him in.
The bottom line ! I sent it Registered AND insured for it's value, so if things do go 'base over apex' I'm covered.