I kind of pity PHB here. The poor guy has surprisingly figured out what Dilbert commented (check out PHB's cheeky look in the last pane) and yet he can't do anything about it because Dilbert happens to be one of his indispensable workers. :)
After I fixed the input validations in the UI of the software that I'm working on (to make the inteface idiot-proof). I've attached this strip in my email for the Software Quality Tester who is in-charged in testing my work. This one made her laugh... Nice Job Scott! ^__^