The problem lies in that you never have a "Car" which should inherit "Vehicle". It's a question that never comes up in programming. The bad part of it, is that it sometimes makes new programmers look for these kind of concepts in their code, and write class-based code around them. Exactly the problem http://pyvideo.org/video/880/stop-writing-classes discusses.

Basicly it teaches people to think in taxonomies, which is not good for object-oriented programming since it usually results in highly complicated code, with way to many classes and inheritance.

Inheritance is mostly good for factoring out common code between different sub-classes. Or extending library classes in a way that wasn't thought of when they were written.