Originally posted by sewebster To me, that says that the acceptable tolerances were chosen incorrectly.
Best practice in any rigorous industry (and approved by the ISO commitee) says that any product should be within tolerances 100% of the time with a 95% confidence level. Just like the odd DOA will occur from time to time, extreme tolerances matches will also occur. It's also more likely to happen wieh many companies are matched together (Pentax camera, Tamron lens). In this age of internet, you're bound to hear some horror stories from time to time. People also have more ways to nickpick about their pictures, going crazy over things they would never have noticed before.