Since I just realized the answer to your question last week, I feel like I should pipe in here as an apprentice on the subject. Everything they are saying is true. I'm not sure about you, but for me I just thought "well if the government says I can put him FF at 1 year, that must be what I should do". WRONG! Since last week I have read the manual for my car seat about 5 times cover to cover and there are some seriously ambiguous statements in there. Knowing what I know now, I see a serious problem with the uninformed parent trying to do what's right for their child. Let's face it, we have a million decisions to make and only want the best for our child. This site is filling a major gap in educating parents.
I have to say one more thing: Just yesterday I realized that the banner on the top of this page is a link to car-safety.org, which is a different domane name than this one (car-seat.org). While they appear to be one in the same, there is a lot of information at car-safety.org that explains more of the RF questions. I feel dumb admitting this, but thought I may not be the only one that didn't realize this.