It looks like Leica's M8 has been giving early customers problems, with a recall likely. They released a statement on their message boards, check it:
Customer feedback to us following the start of shipment of the LEICA M8 points to a performance under certain conditions that does not meet the expectations in the Leica brand. Our technical and engineering teams have isolated the source of these concerns and have identified definitive solutions. Over the next two weeks we will communicate a plan to further assure you of your investment in the LEICA M8.
Apparently the issues involve "IR color casts on certain fabrics and occasional banding," so if you were planning to drop $4,795 on one of these puppies you might want to hold off until a fix is official. –Adam Frucci
Leica statement on M8 issues [DP Review]