orca immediately quitting in login screen.

[Dave Hunt]

Hi,

Since updating the accessibility stack from Precise Proposed, Orca will, 
sometimes, quit immediately after announcing itself, on the login 
greeter.  I can restart Orca by toggling the 'ctrl+s' key, and speech 
stays enabled for the duration of the login dialogue session.  once I 
login, speech for my desktop session works as it should.


Best,


Dave  Hunt