When arrowing through the items with a combo box where the drop down list is not pulled down, the screen reader is supposed to say 'xxx read only combo box'. FX does this, but it is easy to get FX in a state where it seems to be reading the drop down list instead (not sure this description is that great)

1) run HelloComboBox
2) tab to the last combo box in the first column
3) hit down arrow
4) BUG: the screen reader says 'selected xxx' instead of 'xxx read only combo box'
5) click away with the mouse to another control in the window that tales focus
6) click back on the last combo in the first column (list will drop down)
7) Hit Escape to close the combo
8) hit down arrow
9) FIXED: combo is read as 'xxx read only combo box'