Canon brewing yet another autofocus fix for EOS-1D Mark III?

Unfortunately, details are extraordinarily scant at the moment, but it appears that Canon is readying one more fix for the EOS-1D Mark III, which has been plagued with an autofocus issue for what seems like ages. Apparently, the forthcoming fix -- which could involve hardware and / or firmware alterations -- will make improvements even over last year's tweak. Reportedly, the firm's AF engineers are confident that they have now realized the "root cause" of the problem, hinting that this solution may in fact be the last. Per usual, there's been no clues handed out as to when users will actually be notified that a fix is available, but we're sure official word will stream out soon enough if there's anything to this.