[Tb] Auto-save?

I've just recently started using TB and lost data twice while running
it: once when my machine crashed and once when TB did. Is there some
sort of auto-save feature. It seems like a glaring oversight!

Thanks,

-- 
Gary Warren King, Lab Manager
EKSL East, University of Massachusetts * 413 577 0176
"We should get rid of nuclear weapons. Nuclear weapons will not protect 
us. Only a more equitable world will protect us."
-- Ted Turner, Founder, CNN