Hi Streamer. It is not necessarily a new issue for us. A quick search on the homepage for "Ethanol" will connect you with several threads where members have discussed this issue. We're all a bit concerned about it. But from what I understand it is older model engines that have more to be concerned about. Having a fuel/water separator though I think is a must. Here are some links to previous threads:
fuel
Ethenol fuel concerns
yamaha fuel/water separator
10% Ethanol: What does that mean for the engine?
Ethanol and fuel tanks
dick what is the deal with ethanol
There are other threads that mention it too. hope this helps!