There is a notice posted on our mail box installation at the bottom of the hill. Due to an "attempted break-in" our cabinets/boxes are due to be replaced some time in the next three weeks with a more secure style cabinet. When the new cabinets are installed, we will have to get new keys at the post office.
I checked at the post office this afternoon and confirmed that it was an "attempt" on the cabinets that prompted the change.
I have seen quite a few of the newer cabinets in other neighbourhoods.