Clojurians Log v2

I got a kinda bizarre question. Does anybody remember an uncommon parsing error when the keyword was :v? I think I read about this once here but cannot find a reference. It was either about using transit-js or JSON.parse to convert "{\":v\" \"something\"} object. EDIT: Ok got it. I was thinking about that one: https://clojure.atlassian.net/browse/CLJS-3285