Hiya.... yup, the "green flash" is gone, hope it wasn't something buried deep!
Buttons.... I dunno.... I just have an antipathy to them - and yes, I see them on blogs around but to me they tend to show up on sites which land in my "desperate for...." category - that is, blogs which don't have a solid raison d'etre (heh - like so many of my own.... but I don't do buttons....) or a logical focus.
Then again, since I don't do feeds as such, perhaps my impression is out of whack. When I WANT a feed, I use FF's nice little inbuilt "feed" icon in the addy bar. It may be a case of a simple "blindness" on my part.