Several years ago WDW Central Shipping managed to destroy many thousands of dollars worth of limited edition cels. This was after a Disneyana Convention and they opened the boxes and added additional packing materials to protect the framed cels from damage. However, this pressed the plexiglass against the cels and this happened in early September. When these items were shipped, both the long distance trucks as well as the local delivery trucks, the heat welded the cels to the plexiglass in an area about the size of a handprint.
Disney had to pay for the cels to be returned and destroyed, and since the master had not yet been destroyed remake the number of cels which had been destroyed and then reship them.
I know I had two in this group, and had a long discussion with one of the mail order supervisors where I found out that the damage was to several hundred cels.
This is now one reason why Central Shipping is no longer permitted to repackage anything coming from one of the Art of Disney stores.