This was initially reported in Orca bug #403631.

Only the first two entries in a combo box are correctly spoken/brailled by Orca.
This is because they have valid name fields. Other entries in the combo box have
a name field of "".

I will attach a standalone Python script that reproduces this problem.

Steps to reproduce:

1) Run this Python script in an xterm:
   % python bug_403631.py
2) Give focus to a gnome-terminal window.
3) Hit F10 to give focus to the first menu on the menu bar.
4) Hit the right arrow key to move to the Edit Menu.
5) Hit the Up arrow key, to give focus to the "Current Profile..." menu item.
6) Hit Return to bring up the 'Editing Profile "Default"' dialog.
7) Hit the right arrow key to give focus to the "Title and Command" tab.
8) Hit Tab to give focus to the "Initial title:" text field.
9) Git Tab to give focus to the "Dynamically-set title" combo box.
10) Hit Space to show the entries in this combo box.
11) Hit the down arrow key to select the second item.
12) Hit the down arrow key to select the third item.
13) Hit the down arrow key to select the fourth item.
14) Press Esc to dismiss this list.
15) Press F12 to terminate the script.

For the first two items in the combo box, you will see the following output:

focus: 0 0 <CORBA.any of type 'IDL:Accessibility/EventDetails:1.0'>
  name='Replaces initial title' role='menu item' state='ENABLED FOCUSED SELECTABLE SELECTED SENSITIVE SHOWING VISIBLE'
focus: 0 0 <CORBA.any of type 'IDL:Accessibility/EventDetails:1.0'>
  name='Goes before initial title' role='menu item' state='ENABLED FOCUSED SELECTABLE SELECTED SENSITIVE SHOWING VISIBLE'

For the last two item in the combo box you will see:

focus: 0 0 <CORBA.any of type 'IDL:Accessibility/EventDetails:1.0'>
  name=None role='menu item' state='ENABLED FOCUSED SELECTABLE SELECTED SENSITIVE SHOWING VISIBLE'
focus: 0 0 <CORBA.any of type 'IDL:Accessibility/EventDetails:1.0'>
  name='Replaces initial title' role='combo box' state='ENABLED FOCUSED SENSITIVE SHOWING VISIBLE'

Notice that the name field is empty for those last two. 

This is a serious regression from GNOME 2.16, where this works just fine.