Summary: Any time you release a new user interface design, you'll get complaints. This doesn't mean that the new design is worse than the old design; it simply means that it's new, and users don't like to learn different ways of doing things. Tips for reducing change aversion (you can't avoid it completely).
Jakob Nielsen, Ph.D., is a User Advocate and principal of the Nielsen Norman Group which he co-founded with Dr. Donald A. Norman (former VP of research at Apple Computer). Dr. Nielsen established the "discount usability engineering" movement for fast and cheap improvements of user interfaces and has invented several usability methods, including heuristic evaluation. He holds 79 United States patents, mainly on ways of making the Internet easier to use.
