Orca orca crash on start-up

Hello,
I'm running a new feisty install.  After I log in, I can
start orca, but 
it crashes after speaking the welcome message and the
"entering focus 
tracking" message.  
I tried running it from a text console, but it was looking
for a DISPLAY 
environment variable.  To what value should this variable be
set?  

I'm running brltty 3.72 and did get braille output for a few
seconds 
before orca stopped.

Chris
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