I'm not sure where you think there might be a problem.

TYROS is now shipped with OS 1.00

As a Yamaha technician I have some experience in updating the PSR/CVP/TYROS and handling customer requests.

If you want to know anything, don't hesitate to ask. If you think you found a kind of bug, I think it would be great to make a new thread 'bugs & questions'

I will try to be here as often as possible and try to find a solution for your problems.