Who has forgotten a track on the pcb?

In order to test a Mac Pro with a non standard configuration, we recovered a (very expensive) Apple RAID card. For both generations of the MacPro this card is installed in the PCI Express slots on top and takes over control of the 4 hard disks iinstead of the mother card.
On close study of this card, we are surprised to find this:

A line has been added to the pcb by hand using a thin piece of wire. The work has been done in best way possible and this story is more an anecdote rather than a real problem. Apple has done a similar thing with the bipro card in certain macs. Knowing that they took nearly a month to deliver this card, it is possible that this do-it-yourself was set up to ensure compatibility with the last Mac Pro.
As soon as our super-muscular configuration is ready, we will publish the tests.