In a message dated 12/28/00 1:15:42 AM Central Standard Time, RNossaman@KSCABLE.com writes: << Some appropriate measurements at humidity extremes should tell you either what else it's not, or what it is. Either way, you'll eventually run out of things it's measurably not, leaving what it most probably is. Sorry, that's not really an answer, but it's a start on a kit. It's the best I can do. There's just a little more assembly required. Ron N >> Now that we've had all this discussion of this subject, you can bet I will take careful note of this problem. If the hammers are pushing against the strings this summer, I think we can all assume it is the humidity change that is effecting the keybed, or any of the other items you mentioned. The question still remains, however, why is this happening more on Yamamas than on other pianos? Willem
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