We shouldn't have to do this extra decode pass, but somehow we
are now receiving our \"^1\" suffix as \"%5E1\", which confuses us
downstream. Other times we get our embedded \",\" as \"%2C\", which
is equally bad. And yet when these happen a \"%2F\" is left as-is,
rather than escaped as \"%252F\", which makes me feel really really
uncomfortable with a blind decode right here.
