[awinder]

I understand how this could be really frustrating. We solved this problem (well, we never really had it, but we solved the ability of this problem to come up) by having a suite of unit and functional webui tests. Combined that with a CI environment that runs these tests and creates builds only when the tests pass. Ngmin can be a little flakey if you get into fringe situations but deploying broken code is a testing problem, not a toolset problem.