The National Geographic Digital Photography blog has posted the information and link to the Canon Europe website which has a post updating the auto focus tracking issue on the Canon EOS-1D Mark III digital SLR that explains how they plan to fix the problem.
Canon Europe offers an apology and a range of serial numbers for cameras affected by the AF tracking challenge.
"If the serial number on the bottom of the camera is between 501001 and 546561, it could contain one of the AF mirrors with the adjustment problem."
Information is here: Canon Europe Update
