A blank screen, a '.' appears bottom right...
I think that is the problem: the '.' should appear in the middle. I should have originally stated that you must run the obfu in a console window big enough so that when you cat the source code it does not wrap and you can see it all -- 90 characters wide by 46 deep should be plenty. If that turns out not to be the problem, I'd be interested to know the perl version and platform you are running (I've tested it on Linux and Windows with Perl versions 5.005, 5.6 and 5.8 (with and without warnings)).
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