See: http://enticingthelight.com/2010/12/01/review-pentax-k-5/#stainsQuoted, "I can confirm that Pentax Japan is fully aware of this situation and is diligently investigating the cause of these stains. I’d like to remind our US customers that their K-5 is covered under the 1-year warranty and that we’ll of course honor that. However, until we find out which batch(es) are affected by the
