Oh, thanks! I didn't notice that but see it now that you mention it. Maybe the brown spots only show up in tons of sun? I was just asking (blurting, sorry) out of personal curiosity as I am a new Kalanchoe-phile this year, trying to learn how to recognize them. The brown spots might not be 'something.'
Aside from that, what a cool bunch! Pretty, fast-growing, not too stingy about making some flowers, easy to propagate, not thirsty all of the time. I really like these guys after getting to know a few, briefly, so far, and like all of those I've 'met.'