Yes, the bash highlight is missing and the showoff handler kicks in instead resulting in 500. Thanks to the dev mode you get complete stack trace with code preview :)
I admit that was a stupid thing to miss, it works fine, sorry. The Javascript error persists though, not sure if that's affecting anything, but there's nothing noticeable. Works fine for me on Android (default browser JB) too.
Chrome console:
Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://postgres-bits.herokuapp.com/js/sh_lang/sh_bash.min.js
Uncaught HTTP error: status 500 sh_main.min.js:4