You know, unless you use the same exact fabric, I don't see how it can come under copyright either. I always change a little of whatever I do, & seldom do the same exact pattern, so have never seen a reason to worry. They can say that, but it doesn't mean it's so, right! Most of the time, by the time the pattern or mag, or book, is out, that same fabric is not still available anyway, so just do your own thing, make it yours & enjoy!