1. Bring up the JDE with a project defined.
2. Edit a file (without a working file chooser, you have to do a build with an error).
3. THe file has to be more than a page of text.
4. Click on the arrows at each end of the scroll bar - they have no effect
5. Clicking below the square on the scroll bar pages down correctly, but the square
never moves. Dragging it has no effect.