Hi,
The only additional info that i can add is that without scripts no info will be read by Jaws regarding selected conversation window on the left side bar (shift + TAB). With JAWS scripts, information about participant will be read (its name, presence). So JAWS scripts need to be updated to capture information about type of conversation window (filter, search, IM, tel-conversaiotn) regarding icon on the left side bar.
You may engage TAC if you need further details or confirmation.
HTH
Manish