Yes, @dotnetjunky is correct. I don't think live minification is a great idea. We can investigate introducing minification into our build, but for now, I think this is good enough.

Re: Modernizr, I'd actually rather use it in a slightly better way. It's possible to get a script with ONLY the pre-load stuff (document.createElement calls, etc.) and then a minified script with everything else which can go at the bottom. Anyway it's a separate issue we can investigate later.