> It's easy to imagine how this sort of thing would happen - manual test guys don't have hidden folders in their root directories because their boxes are locked

> It's easy to imagine how this sort of thing would happen - manual test guys don't have hidden folders in their root directories because their boxes are locked down by corporate IT and they can't create any folders in the root directory. This is what QA is for. It should be thorough, more thorough than you imagine and performed by someone other than who wrote the code.