Actually, it's FI - Fuel Injection. As Jim stated, the exact cause is unknown as re-ocurrance in seldom and no obvious pattern exists. The guess is that it is somehow related to K-Trac or Eco mode. IIRC, it has only happened on '10-11 abs bikes. If it occurs w/ the non-abs models, it probably has something to do with the Eco mode programming.
So far, it appears to pose no risk.