Fair is fair. After so many negative things, here's a positive post:

I just got a call from Yamaha(Steve)and he assured me that the company will NOT charge for any updates that need to be performed. He mentioned the many of us that have been in contact with him, and said, very plainly - The updates needed WILL be performed at no cost under warrentee. The flash RAM issue is not an option anymore, whether your keyboard has it or not, because there will be no units that have that support in the future. So even if you HAVE the flash RAM, you'll need the update to be done in hardware form. They are not going to release an update that will not work on every unit.
The way he explained it to me, it seems that Yamaha Japan and Yamaha US had a few differences of opinion on the devlopment of this unit, and only the first very few runs had the Flash RAM. So - forget the issue - it's dead.
They WILL stand behind the service of the units, but the repairs to correct the bugs are going to have to be done at an authorized service center. There are worse things, for sure.
There is no date scheduled for the release of this new "chip" to update the unit, but it IS in the works as we speak. So ..... we wait.