barjohn
Established
In fairness to Leica, several well respected reviewers missed the color shift. As has been pointed out there are folks using the camera that still claim they hardley ever need a filter. Could careful testing have discoered it, yes probably; however with pressure to get it out to the market and an error that wasn't readily detected the mistake is understandable. Most of us don't remember what someone was wearing after several hundred shots (especially the liquid ones🙂). Even if they saw the problem they may not have known the cause until a significant amount of time was spent researching the data because they would have assumed the sensor was performing to specifications and thought it was a software issue that they could fix. It is always easy with hindsight to identify and solve the problem.