Using JSBuilder that way implies that you know all the dependencies and don't leave something out. Using the 'BYO' will handle the dependencies for you and let you just pick the components you want. Unless you're building off SVN, there's really no reason to use JSBuilder.
The only problem with BYO is that if I want to come back and add a module, I have to redo it all over again. You are right, I had to figure out all dependencies to get the minimum to work
ExtJs 4.2.0 - Application works using ext-debug.js but fails using ext.js
I'm in a very strange situation, when I use ext-debug.js in my index.jsp file, my application works fine, but when I try to use the minified version of ext-debug.js which is ext.js, my application fails, I'm getting an "Uncaught TypeError: Cannot call method substring of undefined". The problem appears in the method that parses the namespace of the class I want to instantiate. But why this method works fine on the unminified version of extjs? And more importantly what should I do to fix the error? Any ideas? How should I debug this since it appears only in the minified version?