I got my recall notice yesterday. I have always had trouble with the gas cap on my FS90R trimmer. Many times it looks and feels like you have it on tight but then it will pop back off. I've got in the habit of always double-checking. Usually it takes several tries before I get it on right - but it's hard to tell when you have it on right and when it's not - you have to test it to be sure. It would be very easy for someone to think they had the gas cap secure only to have it pop off and spill gasoline while operating it. I thought the ethanol explanation was interesting. Mine has done this from the very beginning.