I noticed that our counter has some trouble in IE9 and earlier. We've had jsonp support on our server for a while, but we've never enabled it on the client. This patch enables it: https://github.com/secretrobotron/stopwatchingus/commit/3691256111d60bd5efc43bac05265fa1db460187#L0R1275 Requesting a quick security review before making it live.
This looks fine to me. The code adds an error path that performs a second request to the js endpoint instead of json on fialure. This data is then passed to a jsonp callback.