Second the mockup point. Even mid-fidelity mockups have caused me all kinds of headaches. Perhaps that uncanny valley effect, but no one ever asks you to move b

Second the mockup point. Even mid-fidelity mockups have caused me all kinds of headaches. Perhaps that uncanny valley effect, but no one ever asks you to move buttons 5px to the left, or change the title bar colour from dark blue to a slightly darker blue with a paper sketch!