Open a System Browser. Choose a class. Click the "class" button to see
the class-side methods. Now hit the "?" button to see the class comment.

You will see the class comment briefly. Then:
- first, the methods list pane flashes and you see the instance methods.
- You see the method template in the text pane.
- then, the method category flashes and is replaced by the instance side
method categories.
- You now see the instance-side class definition.
- now, the "instance" button is highlit.

I doubt this is the desired behavior...

Here's the changed messages being sent by the model (the Browser), if
it'll help:

(select the class button)
#messageListIndex
#contents
#annotation

(hit the ? button)
#messageCategorySelectionChanged
#messageCategoryListIndex
#messageList
#contents
#annotation
#classSelectionChanged
#contents
#annotation
#messageListIndex
#contents
#annotation

(hit the class button again)
#classSelectionChanged
#messageCategoryList
#messageList
#contents

(now the instance button)
#classSelectionChanged
#messageCategoryList
#messageList
#contents

(and the ? button)
#messageCategorySelectionChanged
#messageCategoryListIndex
#messageList
#contents
#annotation
#classSelectionChanged
#contents
#annotation