One of the women in my department (Brit citizen) is married to guy from the US. He is on his FLR now, and should be eligible to apply for FLR in March 2007.
Since they have been married, he has had to return to the US numerous times (more than 90 days total) to sort out his US passport. (He immigrated to the US from Iraq in the 80's as an asylum seeker, and was converting his green card to US citizenship.) They didn't know about the limitation on the number of days you could be away (non work related).
I was talking with her today, and she said there is nothing on the application form that asks you if you have been out of the country, and wondered how they would know he had been gone. Since I am here on a WP, I rarely pay close attention to the FLR/ILR rule discussions, but isn't there a chance he might be turned down for his ILR?