With the recent changes for bug #486908, we are now getting
"not selected" spoken as we navigation about amongst the 
spreadsheet cells in oocalc.

Here's such an event that's causing this:

...
vvvvv PROCESS OBJECT EVENT object:active-descendant-changed vvvvv
OBJECT EVENT: object:active-descendant-changed         detail=(3588,0)
    app.name='soffice' name='Sheet Sheet1' role='table' state='editable enabled focusable focused multiselectable opaque selectable showing visible manages descendants' relations=''
LOCUS OF FOCUS: app='soffice' name='Cell E15 ' role='table cell'
                event='object:active-descendant-changed'
OBJECT EVENT: object:active-descendant-changed         detail=(3588,0)
             app.name='soffice' name='Sheet Sheet1' role='table' state='editable enabled focusable focused multiselectable opaque selectable showing visible manages descendants' relations=''
GENERATOR: _getBrailleRegionsForTable
           obj             = Sheet Sheet1
           role            = table
GENERATOR: _getDefaultBrailleRegions
           obj             = Sheet Sheet1
           role            = table
GENERATOR: _getDefaultBrailleRegions
           obj             = Document view3
           role            = unknown
GENERATOR: _getDefaultBrailleRegions
           obj             = 
           role            = scroll pane
Object deemed to be for layout purposes only: [panel | ]
GENERATOR: _getDefaultBrailleRegions
           obj             = Untitled1 - OpenOffice.org Calc
           role            = root pane
GENERATOR: _getBrailleRegionsForFrame
           obj             = Untitled1 - OpenOffice.org Calc
           role            = frame
GENERATOR: _getDefaultBrailleRegions
           obj             = Untitled1 - OpenOffice.org Calc
           role            = frame
GENERATOR: _getDefaultBrailleRegions
           obj             = soffice
           role            = application
Script.getObjects looking at child 0
Script.getObjects looking at child 0
Script.getObjects looking at child 1
Script.getObjects looking at child 2
Script.getObjects looking at child 3
Script.getObjects looking at child 4
Script.getObjects looking at child 0
Script.getObjects looking at child 5
Script.getObjects looking at child 6
Script.getObjects looking at child 7
Script.getObjects looking at child 8
Script.getObjects looking at child 9
Script.getObjects looking at child 0
Script.getObjects looking at child 1
Script.getObjects looking at child 2
Script.getObjects looking at child 3
Script.getObjects looking at child 4
Script.getObjects looking at child 5
Script.getObjects looking at child 0
Script.getObjects looking at child 1
Script.getObjects looking at child 2
Script.getObjects looking at child 1
Script.getObjects looking at child 0
Script.getObjects looking at child 0
Script.getObjects looking at child 0
Script.getObjects looking at child 1
Script.getObjects looking at child 1
Script.getObjects looking at child 2
Script.getObjects looking at child 3
Script.getObjects looking at child 4
Script.getObjects looking at child 5
Script.getObjects looking at child 6
Script.getObjects looking at child 0
Script.getObjects looking at child 0
BRAILLE LINE:  'soffice Application Untitled1 - OpenOffice.org Calc Frame Untitled1 - OpenOffice.org Calc RootPane ScrollPane Document view3 Sheet Sheet1 Table Cell E15 '
     VISIBLE:  'Cell E15 ', cursor=1
default.findCommonAncestor...
...default.findCommonAncestor
Finding top-level object for source.name=Cell E15 
--> obj.name=Sheet Sheet1
--> obj.name=Document view3
--> obj.name=
--> obj.name=
--> obj.name=Untitled1 - OpenOffice.org Calc
--> obj.name=Untitled1 - OpenOffice.org Calc
SPEECH OUTPUT: ''
SPEECH OUTPUT: ' E15'
SPEECH OUTPUT: ' not selected'
^^^^^ PROCESS OBJECT EVENT object:active-descendant-changed ^^^^^
...

Looks like we'll need to special case this in the StarOffice.py script.
Thanks to Joanie for pointing this out.