I'd like to make a question to all of you, the people with this issue: Is this perceivable from day one? I mean, the 14 day period is more than enough to detect a problematic keyboard and, thus, return the whole unit, right?
For us, it was not initially perceived. However, as we have now gone through multiple replacements, we are sensitive to the warning signs. That is keys begin to sound different on key strike, gradually more and more typos (an issue with passwords), tactile sensation changes, etc. However, these were not noticed initially.