Originally posted by tibbitts the initial failures of K5s seems excessive
One day in the future, it would be useful to see a K-5 quality control report from someone analysing all the problems (real or perceived) with the K-5. Comparing the K-5 experience with the K-7 would be particularly useful.
At the end of the day I suspect some of the blame for various quality issues (eg the sensor stain stuff) may be related to their sensor supplier having QC issues, rather than Pentax per se. (This might explain why the K-5 had sensor stains but not the K-7, for example).
Other issues (like the lens-change buttons falling off on the K-5 but not reportedly on the K-7) may be due to engineering or design changes Pentax made between the K-7 and the K-5, or simply due to irregular quality issues on the assembly line floor.
Other reported issues may simply be due to the fact that more people bought the K-5 than bought the K-7, so even if the percentage of bodies with QC issues was still the same constant low figure, the probability of people reporting any issues was going to be higher just because there were more users.