There's only one firmware available: 1.0.0.1. So rollback isn't really possible. You could try to install the same thing again. Other than that, I'd go into the VooPoo configuration software and set everything back to default values (big default button on almost every configuration page). Maybe that fixes it?
Software here, if you don't have it:
http://en.voopootech.com/download-support
Have you tried a different atty? Maybe something wonky going on there?[/QUO
Rebooting laptop, going to try everything I can in the software. I have tried 8 different tanks with about 10 different builds. But will try this again and see if it works.