Actually, Ian... 'whining' (or as it is known in less fanboy circles "customer feedback"

) IS the way to get things improved.

You know, if, rather than rushing to 'poor' Yamaha's defense every time, you (and other PSR users) were a bit more honest about what you would like to see improved (I have no doubt whatsoever that if Yamaha improved the build quality WITHOUT jacking up the price - as they do for WS's - you would be crowing about that as loudly as you do it's other great qualities), Yamaha MIGHT take some notice. Most companies DO take notice of customer feedback (or go under quickly)...
But what you are doing now, singing the Corporate Anthem (do you do the morning calisthenics, sarariman?

) and kowtowing the 'official line' basically GUARANTEES that no improvement will be made. If you can't bring yourself to SAY what could be better, why should they even try?