Recently I've been writing some OpenSocial gadgets for IBM Connections.
IBM Connections helpfully bundles and minifies all the JavaScript resources into a single line in a single file for a smaller file size and fewer HTTP requests. This is great for production, but somewhat limiting when you're trying to debug JavaScript.
If you append ?debug=true to a URL, all the JavaScript files are fetched separately and unminified.
Use ?debug=dojo to have all files concatenated, but unminified.