Chapter 4.2 of the (1.0) spec misses a bullet point about inheritance of observer methods.
Either

• If X declares a non-static observer method x() then Y does inherit this method.
  or
• If X declares a non-static observer method x() then Y does not inherit this method.
  (This behavior is different to what is defined in the Common Annotations for the Java Platform specification.)
  should be added.

Don't know, what's right through...