I believe it is mostly fixed.  The behavior now is mostly what I expected.  Setting
a cursor for a box within a box overrides the cursor for the containing box,
as I expected.  The only thing that does not work as I expected (but perhaps
this is not a bug) is that when I set the cursor to the Wait cursor for an 
EV_TEXT_FIELD, which is one of the elements of an EV_HORIZONAL_BOX, the
Wait cursor only shows up in the space around the text entry portion of
the field.  In the text entry portion, the cursor is still an I-beam.
This is not entirely desirable, since moving the mouse over the text entry
portion of a text field changes it from a Wait cursor to an I-beam, making
it look like it would be OK to enter text.

However, you can close this if you like.